Websink Prep UKKS1 MathsYear 2 chaptersMaths textbooksYear 1Year 2Year 4Year 5Year 6GCSEBrowse allPast papersFind a tutorBecome a tutor
Primary Maths · Year 2Chapter 1 · Place value to 100
Year 2 · Chapter 1

Place value to 100

By the end of this chapter you will be able to

  • Count in twos, threes and fives, forwards and backwards
  • Count in tens from any number
  • Say how many tens and ones a number has, and what each digit is worth
  • Write numbers to 100 in numerals and in words
  • Compare two numbers with the signs <, > and =, and put numbers in order
  • Place numbers on a number line, and solve simple problems using place value

You should already know

  • Numbers to 100 (Year 1)
  • Counting in tens (Year 1)
  • Comparing numbers to 100 (Year 1)

Where this leads

  • Adding and subtracting (Chapter 2)
  • Multiplying and dividing in twos, fives and tens (Chapter 3)

National Curriculum for England, Key Stage 1 mathematics, Year 2. Content: Count in steps of 2, 3 and 5 from 0, forwards and backwards, Count in tens from any number, forwards and backwards, Recognise the place value of each digit in a two-digit number (tens and ones), Identify, represent and estimate numbers, including on a number line, Read and write numbers to 100 in numerals and in words, Compare and order numbers from 0 to 100, using the signs <, > and =, Use place value and number facts to solve problems.

Exercise P  Do you remember?

Non-calculator
1
FHow many stars are there?
2
FWhat number comes after 49?
4546474849505152535455
3
FWhat number comes before 60?
5556575859606162636465
4
FHow many tens and ones are in 36?
5
FCount on from 17. Say the next three numbers.
1516171819202122232425
1.1

Counting in twos, threes and fives

Year 2
Count in steps of 2, 3 and 5 from 0, forwards and backwards
Video lesson: Counting in twos, threes and fivesComing soon
Skipping and jumping in the playground.

We can count in steps. A step is the same jump every time.

Counting in twos jumps 2 each time: 2, 4, 6, 8, 10.

Counting in threes jumps 3 each time: 3, 6, 9, 12.

Counting in fives jumps 5 each time: 5, 10, 15, 20.

We can count back too. Start high and take the step away each time.

012345678910
Counting in twos. Each orange dot is one step of 2.

Key ideas

  • Counting in twos: 2, 4, 6, 8, 10.
  • Counting in threes: 3, 6, 9, 12, 15.
  • Counting in fives: 5, 10, 15, 20, 25.
  • To count back, take the step away each time.
Worked example 1.1.1
Count in twos from 0. Say the first five numbers.
012345678910

Method. Start at 0. Count on in twos.

  1. Start at 0. Put your finger on the number you start from.
    Start: 0
  2. Say each number, going on 2 each time. Each new number is 2 more than the one before.
    2, 4, 6, 8, 10
  3. Write the numbers in order. Write each number you said.
    2, 4, 6, 8, 10

Check. Count back from 10. You reach 0. ✓

Watch out. Do not say 0 again. Start with the next number.

Worked example 1.1.2
Count in fives from 0 to 30. Say each number.
0102030

Method. Start at 0. Count on in fives.

  1. Start at 0. Put your finger on the number you start from.
    Start: 0
  2. Say each number, going on 5 each time. Each new number is 5 more than the one before.
    5, 10, 15, 20, 25, 30
  3. Write the numbers in order. Write each number you said.
    5, 10, 15, 20, 25, 30

Check. Count back from 30. You reach 0. ✓

Watch out. Do not say 0 again. Start with the next number.

Worked example 1.1.3
Count back in threes from 18. Say the next four numbers.
6789101112131415161718

Method. Start at 18. Count back in threes.

  1. Start at 18. Put your finger on the number you start from.
    Start: 18
  2. Say each number, going back 3 each time. Each new number is 3 less than the one before.
    15, 12, 9, 6
  3. Write the numbers in order. Write each number you said.
    15, 12, 9, 6

Check. Count on from 6. You reach 18. ✓

Watch out. Do not say 18 again. Start with the next number.

Watch out

Watch out: the steps must stay the same. Count 2, 4, 6, not 2, 4, 7.

Exam tip

Grown-up tip. Clap on each number as your child says it. Ask: “What comes after 14 when we count in twos?”

Exercise 1A  Counting in twos, threes and fives

Non-calculator
1
FCount in twos from 0. Say the next three numbers.
012345678910
2
FCount in twos. Fill in the missing number: 8, 10, ?, 14
891011?1314
3
FCount in threes from 0. Say the next three numbers.
012345678910
4
FCount in threes. Fill in the missing numbers: 12, ?, 18, 21, ?
121314?1617181920212223?
5
FCount in fives from 0. Say the next four numbers.
01234567891011121314151617181920
6
FCount in fives. Fill in the missing numbers: 25, ?, 35, ?, 45
2526272829?313233343536373839?4142434445
7
FCount on in twos from 10. Say the next four numbers.
1011121314151617181920
8
FCount back in twos from 20. Say the next four numbers.
1011121314151617181920
9
FCount back in threes from 30. Say the next three numbers.
15161718192021222324252627282930
10
FCount back in fives from 50. Say the next three numbers.
303132333435363738394041424344454647484950
11
FThere are 4 pairs of socks. How many socks are there?
12
PSBen has 3 bags. Each bag has 5 marbles. How many marbles are there altogether?
13
RMei says 6 is in the count in threes. Is she right? How do you know?
0123456789101112
1.2

Counting in tens from any number

Year 2
Count in tens from any number, forwards and backwards, Ten more and ten less
Video lesson: Counting in tens from any numberComing soon
Packs of ten in the shop.

A ten is a jump of 10. We can count in tens: 10, 20, 30, 40.

We can start at any number. Start at 34 and count on in tens: 44, 54, 64.

Only the tens digit changes. The ones digit stays the same.

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
Start at 34. Each jump of ten goes down one row.

Key ideas

  • Counting in tens changes only the tens digit.
  • 10 more: go down one row on the 100 square.
  • 10 less: go up one row on the 100 square.
  • The ones digit stays the same.
Worked example 1.2.1
Count on in tens from 34. Say the next three numbers.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100

Method. Start at 34. Count on in tens.

  1. Start at 34. Put your finger on the number you start from.
    Start: 34
  2. Say each number, going on 10 each time. Each new number is 10 more than the one before.
    44, 54, 64
  3. Write the numbers in order. Write each number you said.
    44, 54, 64

Check. Count back from 64. You reach 34. ✓

Watch out. Do not say 34 again. Start with the next number.

Worked example 1.2.2
Count back in tens from 75. Say the next three numbers.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100

Method. Start at 75. Count back in tens.

  1. Start at 75. Put your finger on the number you start from.
    Start: 75
  2. Say each number, going back 10 each time. Each new number is 10 less than the one before.
    65, 55, 45
  3. Write the numbers in order. Write each number you said.
    65, 55, 45

Check. Count on from 45. You reach 75. ✓

Watch out. Do not say 75 again. Start with the next number.

Worked example 1.2.3
What is 10 more than 58?
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100

Method. 10 more changes only the tens digit.

  1. Find 58. 58 is 5 tens and 8 ones.
    58 = 5 tens and 8 ones
  2. Add one ten. The ones digit stays the same.
    5 tens + 1 ten = 6 tens and 8 ones
  3. Write the answer.
    68

Check. 58 + 10 = 68. ✓

Watch out. Only the tens change. 58 becomes 68, not 59.

Watch out

Watch out: 10 more than 58 is 68, not 59. Only the tens change.

Exam tip

Grown-up tip. Point to a number on a 100 square. Ask: “What is 10 more?” Then move your finger down one row together.

Exercise 1B  Counting in tens from any number

Non-calculator
1
FCount on in tens from 23. Say the next two numbers.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
2
FCount back in tens from 62. Say the next two numbers.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
3
FWhat is 10 more than 47?
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
4
FWhat is 10 less than 81?
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
5
FWhat is 10 more than 35?
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
6
FFill in the missing numbers: 16, 26, ?, 46, ?
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
7
PSMei is on 38 on a number track. She counts on 10. Which number does she land on?
303132333435363738394041424344454647484950
8
PSLeo had 25 stickers. He gets 10 more. How many stickers does he have now?
9
PSSam has 6 bags. Each bag has 10 pencils. How many pencils are there altogether?
10
RRavi says 10 more than 49 is 50. Is he right? Explain.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
1.3

Tens and ones

Year 2
Recognise the place value of each digit in a two-digit number, Represent numbers in different ways
Video lesson: Tens and onesComing soon
Biscuits are packed in tens, like bakery boxes.

Every number to 100 has tens and ones. A ten is a bar of ten squares. A one is a single square.

The number 47 has 4 tens and 7 ones. The 4 is worth 40. The 7 is worth 7.

The number 47: 4 tens (bars of ten) and 7 ones (single squares).
TensOnes
47
The same number in a tens and ones table.

Key ideas

  • A ten is a bar of ten ones.
  • The tens digit is on the left.
  • The ones digit is on the right.
  • The place of a digit tells us what it is worth.
Worked example 1.3.1
How many tens and ones are in 35?

Key words. A ten is a bundle of ten ones. A one is a single thing.

Method. Count the groups of ten first. Then count the ones left over.

  1. Count the tens in 35. Each group of ten is one ten.
    30 is 3 tens
  2. Count the ones left over. The ones are what is left after the tens.
    35 − 30 = 5 ones
  3. Write the answer.
    3 tens and 5 ones

Check. Put them back together: 30 + 5 = 35. ✓

Watch out. The tens come first when you say the number. 25 is 2 tens and 5 ones.

Worked example 1.3.2
What is the value of the 6 in 62?

Key words. The value of a digit is how much it is worth.

Method. The place of a digit tells us what it is worth.

  1. Find the tens digit in 62. The tens digit is on the left.
    The tens digit is 6
  2. Work out what 6 tens is worth. 6 tens means 6 groups of ten.
    6 tens = 60
  3. Write the answer.
    60

Check. 60 + 2 = 62, so the tens and ones make 62. ✓

Watch out. The digit is not always worth what it shows. In 62, the tens digit is worth 60.

Worked example 1.3.3
Write the number for 4 tens and 9 ones.

Method. Start with the tens, then add the ones.

  1. Write 4 tens. The tens go on the left.
    4 tens = 40
  2. Add 9 ones. The ones go on the right, after the tens.
    40 + 9 = 49
  3. Write the number.
    49

Check. Read it back: 49 has 4 tens and 9 ones. ✓

Watch out. The tens digit goes on the left. Write 4 tens and 9 ones as 49.

Watch out

Watch out: the 2 in 25 is worth 20, not 2. The place of the digit changes its value.

Exam tip

Grown-up tip. Put 10 buttons in a cup. The cup is one ten. Keep the loose ones on the table. Ask: “How many cups? How many loose ones?”

Exercise 1C  Tens and ones

Non-calculator
1
FHow many tens and ones are in this picture?
2
FHow many tens are in 70?
3
FHow many ones are in 46?
4
FWrite the number: 5 tens and 2 ones.
5
FWrite the number that has 1 ten and 8 ones.
6
FWhat is the value of the 7 in 73?
7
FWhat is the value of the 1 in 41?
8
RTom says 27 has 7 tens and 2 ones. Is he right? Explain.
9
ROdd one out: which number does not have 4 tens? Look at 43, 46, 54 and 49.
10
PSPriya has 3 bags of 10 marbles and 4 loose marbles. How many marbles does she have altogether?
11
PSRavi has 9 tens and 0 ones. Which number is it?
12
RAre 40 + 6 and 4 tens and 6 ones the same? Explain why.
1.4

Numbers in numerals and in words

Year 2
Read and write numbers to 100 in numerals and in words
Video lesson: Numbers in numerals and in wordsComing soon
Counting and naming the things in our classroom.

We can write a number with digits, like 36. This is a numeral.

We can also write it in words, like thirty-six.

Numbers from 11 to 19 have special names. For example, fifteen.

Other numbers have a tens word and a ones word.

There are 15 stars. We say fifteen.

Key ideas

  • A numeral uses digits, like 36.
  • Words are the name of the number, like thirty-six.
  • Numbers from 11 to 19 have special names.
  • A hyphen joins the tens word and the ones word.
  • One hundred is written as 100.
Worked example 1.4.1
Write 36 in words.

Key words. A numeral is a number written with digits, like 36. Words are written out, like thirty-six.

Method. Say the number out loud, then write the words for it.

  1. Split the number into tens and ones. The tens come first, then the ones.
    36 = 3 tens and 6 ones
  2. Write the tens word. 3 tens is written as thirty.
    thirty
  3. Add the ones word after a hyphen. A hyphen joins the tens word and the ones word.
    thirty-six

Check. Read it back: thirty-six is 36. ✓

Watch out. Put a hyphen between the tens word and the ones word, like thirty-six.

Worked example 1.4.2
Write forty-two as a number.

Method. Break the word into a tens word and a ones word.

  1. Find the tens word. forty means 4 tens.
    forty = 40
  2. Find the ones word. The ones word comes after the hyphen.
    two = 2
  3. Add the tens and the ones. Put the tens and the ones together.
    40 + 2 = 42
  4. Write the answer.
    42

Check. Say the number: forty-two is 42. ✓

Watch out. The tens word comes first, like thirty in thirty-six.

Worked example 1.4.3
Write 15 in words.

Key words. A numeral is a number written with digits, like 36. Words are written out, like thirty-six.

Method. Say the number out loud, then write the words for it.

  1. Look at the number. Some numbers have their own names, from 0 to 19.
    15
  2. Write the name. Write the word for the whole number.
    fifteen
  3. Check the spelling. Spell each part carefully.
    fifteen

Check. Read it back: fifteen is 15. ✓

Watch out. Put a hyphen between the tens word and the ones word, like thirty-six.

Watch out

Watch out: thirteen and thirty sound alike. Thirteen is 13. Thirty is 30.

Exam tip

Grown-up tip. Say the number out loud and clap each part: thir-teen, thir-ty. Ask: “Which word ends in -teen?”

Exercise 1D  Numbers in numerals and words

Non-calculator
1
FCount the apples. Write the number in words.
2
FCount the sweets. Write the number in words.
3
FWrite thirty-four as a number.
4
FWrite 47 in words.
5
FWrite 63 in words.
6
FWrite 81 in words.
7
FWrite ninety-six as a number.
8
FWrite seventy-two as a number.
9
FCircle the number that is forty-eight. Choose from 84, 48 or 40.
10
RSam says the number 14 is forty-one. Is he right? Explain.
11
PSMei has 30 stickers. She gets 5 more. Write how many she has in words.
12
RAnswer both parts.
(a)Write one hundred as a number.
(b)How many tens are in one hundred?
1.5

Comparing and ordering numbers

Year 2
Compare and order numbers from 0 to 100, using <, > and =
Video lesson: Comparing and ordering numbersComing soon
Piles of books in the school library.

We use signs to compare numbers. The sign < means less than.

The sign > means more than. The sign = means equal to.

Look at the tens first. More tens means a bigger number.

If the tens are the same, look at the ones.

Pile APile B
Pile A has 47. Pile B has 52. Look at the tens first.

Key ideas

  • < means less than. The point faces the smaller number.
  • > means more than. The open end faces the bigger number.
  • = means equal to. Both numbers are the same.
  • Look at the tens first, then the ones.
Worked example 1.5.1
Fill in the box with <, > or =: 47 ? 52
AB

Key words. < means less than. > means more than. = means equal to.

Method. Compare the tens first. Only look at the ones if the tens are the same.

  1. Look at the tens of each number. The tens tell us the big part of each number.
    47: 4 tens   52: 5 tens
  2. Compare the tens. More tens means a bigger number.
    5 tens is more than 4 tens
  3. Write the sign. The point of the sign faces the smaller number.
    47 < 52

Check. Read it out loud: 47 is less than 52. ✓

Watch out. A number with more ones is not always bigger. Look at the tens first.

Worked example 1.5.2
Fill in the box with <, > or =: 36 ? 36
AB

Key words. < means less than. > means more than. = means equal to.

Method. Compare the tens first. Only look at the ones if the tens are the same.

  1. Look at the tens of each number. The tens tell us the big part of each number.
    36: 3 tens   36: 3 tens
  2. The numbers are the same. Equal means the same amount.
    36 = 36
  3. Write the sign. Use the equals sign.
    36 = 36

Check. Read it out loud: 36 is equal to 36. ✓

Watch out. A number with more ones is not always bigger. Look at the tens first.

Worked example 1.5.3
Put these numbers in order, smallest first: 63, 36, 90, 58.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100

Key words. Smallest is the least. Biggest is the most.

Method. Compare the tens first, then the ones, and put the numbers in order.

  1. Look at the tens of each number. A number with fewer tens is smaller.
    63: 6 tens   36: 3 tens   90: 9 tens   58: 5 tens
  2. Put them in order, smallest first. Start with the smallest number, then the next one.
    36, 58, 63, 90
  3. Write the answer.
    36, 58, 63, 90

Check. There are 4 numbers in the question and 4 in the answer. ✓

Watch out. Check you have not left a number out, and that each number is used once.

Watch out

Watch out: do not compare only the ones. 39 is less than 51, even though 9 is more than 1.

Exam tip

Grown-up tip. Write two numbers on cards. Ask your child to point to the bigger one. Then ask: “Which way does the sign point?”

Exercise 1E  Comparing and ordering numbers

Non-calculator
1
FWhich is bigger: 26 or 62?
AB
2
FFill in the box with <, > or =: 70 ? 67
AB
3
FFill in the box with <, > or =: 25 ? 52
AB
4
FFill in the box with <, > or =: 40 ? 40
AB
5
FPut these in order, smallest first: 81, 18, 42.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
6
FPut these in order, biggest first: 74, 47, 72, 27.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
7
FWhich number is the biggest: 58, 85 or 52?
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
8
FWhich number is the smallest: 31, 29 or 60?
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
9
FFill in each box with <, > or =.
ABABAB
(a)19 ? 91
(b)55 ? 50
(c)28 ? 82
10
PSMei has 52 stickers. Leo has 47 stickers. Who has more stickers?
MeiLeo
11
RTom says 9 is bigger than 25, because 9 is more than 2. Is Tom right? Explain.
AB
12
RPut 34, 43, 39 and 30 in order, smallest first. Explain how you know.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
1.6

Number lines and place value problems

Year 2
Identify, represent and estimate numbers, including on a number line, Use place value and number facts to solve problems
Video lesson: Number lines and place value problemsComing soon
A walk along the path, with numbered posts.

A number line shows numbers in order. Bigger numbers are further to the right.

We can say which two tens a number is between. 47 is between 40 and 50.

An estimate is a sensible guess. We can check it on the line.

4041424344454647484950
The arrow points to 47. It is between 40 and 50.

Key ideas

  • Bigger numbers are further to the right on a number line.
  • Find the two tens either side of a number.
  • To estimate, think about which ten is closer.
  • Use place value to solve problems: count the tens, then the ones.
Worked example 1.6.1
Which two tens is 47 between?
4041424344454647484950

Method. Find the ten just below the number and the ten just above it.

  1. Find the ten just below 47. 47 has 4 tens and 7 ones.
    40 is below 47
  2. Find the ten just above it. Add 10 to the ten below.
    40 + 10 = 50
  3. Write the answer.
    40 and 50

Check. 47 is between 40 and 50. It is not a ten. ✓

Watch out. A number that ends in 0 is a ten. Other numbers sit between two tens.

Worked example 1.6.2
The arrow points to a number on the line. What number is it?
3031323334353637383940

Method. Start at the first number on the line and count along to the arrow.

  1. Look at the numbers at each end. The line goes from 30 to 40.
    30 to 40
  2. Count along from 30 to the arrow. Each mark on the line is one more than the one before.
    36 − 30 = 6 steps
  3. Write the number the arrow shows. 30 + 6 = 36.
    36

Check. Count on 6 from 30. You reach 36. ✓

Watch out. Start at 30, the first number on the line. Each mark is one more.

Worked example 1.6.3
Priya has 3 tens and 9 ones. What number is 1 more?

Method. Count on one more from 39.

  1. Make the number first. 3 tens and 9 ones is 39.
    30 + 9 = 39
  2. Add one more. One more than 39 is the next number.
    39 + 1 = 40
  3. Write the answer.
    40

Check. Count back one from 40. You reach 39. ✓

Watch out. 39 + 1 is 40, not 30. The ones become 0 and the tens go up by one.

Watch out

Watch out: 39 + 1 is 40, not 30. The ones digit becomes 0 and the tens go up.

Exam tip

Grown-up tip. Draw a number line from 30 to 40 on paper. Ask: “Where would 36 go? Is it closer to 30 or to 40?”

Exercise 1F  Number lines and place value problems

Non-calculator
1
FWhich two tens is 23 between?
2021222324252627282930
2
FThe arrow points to a number. What number is it?
012345678910
3
FThe arrow points to a number. What number is it?
6061626364656667686970
4
FIs 38 closer to 30 or to 40?
3031323334353637383940
5
FIs 52 closer to 50 or to 60?
5051525354555657585960
6
FWhat number is halfway between 40 and 50?
4041424344454647484950
7
FThe arrow is near the middle of 0 and 100. Is it near 10, 50 or 90?
0102030405060708090100
8
FWhich number goes in the box? 30, ?, 50
30313233343536373839?41424344454647484950
9
PSRavi has 3 tens and 5 ones. Mei has 2 tens and 9 ones. Who has more?
RaviMei
10
PSA jar holds 40 sweets. Ben puts in 6 more. How many sweets are in the jar now?
11
PSZara has 2 packs of 10 stickers. Her friend has 2 packs of 10. How many stickers are there in all?
12
RSam says the arrow at 46 is closer to 40 than to 50. Is he right? Explain.
4041424344454647484950

Chapter summary

SkillMethod
Counting in twos, threes and fivesAdd the same step each time. To count back, take the step away.
Counting in tensOnly the tens digit changes. The ones digit stays the same.
Tens and onesThe tens digit is on the left. 4 tens is worth 40.
Numerals and wordsWrite the tens word, then a hyphen, then the ones word: thirty-six.
Comparing numbersLook at the tens first. Use <, > or = to show which is bigger.
Number linesBigger numbers are further right. Find the two tens either side of a number.

Can you…?

  • I can count in twos, threes and fives, forwards and back
  • I can count in tens from any number
  • I can say how many tens and ones a number has
  • I can say what a digit is worth
  • I can write numbers to 100 in numerals and in words
  • I can compare numbers with <, > and =, and put them in order
  • I can place a number on a number line

Key terms

number line
a line with numbers in order, bigger numbers on the right
tens digit
the digit on the left, which tells how many tens
ones digit
the digit on the right, which tells how many ones
place value
how much a digit is worth, because of where it is
numeral
a number written with digits, like 36
estimate
a sensible guess at an amount or a place on a line
step
the same jump each time when we count

Exercise 1Z  Check-up

Non-calculator
1
Count on in twos from 10. Say the next three numbers.
1011121314151617181920
2
Count in fives. Fill in the missing number: 15, 20, ?, 30
15161718192021222324?2627282930
3
Count on in tens from 46. Say the next two numbers.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
4
What is 10 less than 73?
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
5
How many tens and ones are in 68?
6
What is the value of the 5 in 53?
7
Write the number: 7 tens and 3 ones.
8
Write 84 in words.
9
Fill in the box with <, > or =: 39 ? 93
AB
10
Put these in order, smallest first: 64, 46, 56.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100

Total 12 marks. Allow about 12 minutes.

Exercise 1X  End-of-chapter quiz

Non-calculator
1
FCount in twos. Say the next four numbers after 6.[1 mark]
67891011121314
2
PSThere are 5 pairs of socks. How many socks are there?[1 mark]
3
FCount back in threes from 21. Say the next three numbers.[2 marks]
10111213141516171819202122232425
4
FCount on in tens from 27. Say the next two numbers.[1 mark]
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
5
FWhat is 10 more than 84?[1 mark]
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
6
FWrite the number: 9 tens and 1 one.[1 mark]
7
FWhat is the value of the 8 in 84?[1 mark]
8
FWrite forty-five as a number.[1 mark]
9
FFill in the box with <, > or =: 58 ? 85[1 mark]
AB
10
RWhich ten is 36 closer to: 30 or 40? Explain how you know.[2 marks]
3031323334353637383940
Chapter 2: Adding and subtracting →

Websink Prep UK is an independent site. It is not affiliated with, endorsed by or sponsored by AQA, Pearson Edexcel, OCR, WJEC, Eduqas, CCEA, SQA, GL Assessment, CEM or the Department for Education. All exam board names and trademarks belong to their owners. Past papers are linked from the exam boards' own websites and are not hosted here.

About Websink Prep UK · Find a tutor · Privacy · Terms · Cookie settings