Step-by-step Maths Level 2: Counting and place value

Method. Find the tens first, then the ones.

1. Find the tens word. The tens word tells us how many tens.
   seventy = 7 tens
2. Find the ones word. The ones word tells us the ones digit.
   five = 5
3. Write the numeral. Tens digit first, then ones digit.
   75

Check. Say 75 as a number name to check: seventy-five.

Watch out. Write the tens digit first. Seventy-four is 74, not 47.

Method. The numbers go up in steps of 5. Find the step first.

1. Find the step. Each number is 5 more than the one before.
   60, 65, 70
2. Count on in steps to fill the gaps. Add the step to the number before each gap.
   60, 65, 70, 75, 80
3. Write the missing numbers.
   65 and 75

Check. Check the whole row: 60, 65, 70, 75, 80. Each step is 5.

Watch out. Do not count in ones. Count in steps of 5.

Method. Start at the number and count back in steps.

1. Start at the first number. It is where we begin.
   65
2. Count back by 8. Say each number we pass.
   65 - 8 = 57
3. Write the answer. This is the last number we said.
   57

Check. Count on 8 from 57 to check. You arrive at 65.

Watch out. Count back from the number you start with. Do not count the starting number again.

Method. The numbers go up in steps of 10. Find the step first.

1. Find the step. Each number is 10 more than the one before.
   30, 40, 50
2. Count on in steps to fill the gaps. Add the step to the number before each gap.
   30, 40, 50, 60, 70
3. Write the missing numbers.
   30 and 50

Check. Check the whole row: 30, 40, 50, 60, 70. Each step is 10.

Watch out. Do not count in ones. Count in steps of 10.

Method. The numbers go up in steps of 5. Find the step first.

1. Find the step. Each number is 5 more than the one before.
   50, 55, 60
2. Count on in steps to fill the gaps. Add the step to the number before each gap.
   50, 55, 60, 65, 70
3. Write the missing numbers.
   55 and 65

Check. Check the whole row: 50, 55, 60, 65, 70. Each step is 5.

Watch out. Do not count in ones. Count in steps of 5.

Method. The tens digit tells us the tens. The ones digit tells us the ones.

1. Look at the first digit. It is the number of tens.
   5 tens
2. Look at the second digit. It is the number of ones.
   8 ones
3. Write the answer. Say the tens, then the ones.
   5 tens and 8 ones

Check. 5 tens is 50, and 50 + 8 = 58.

Watch out. Read the digits from left to right. The left digit is the tens.

Method. The numbers go up in steps of 10. Find the step first.

1. Find the step. Each number is 10 more than the one before.
   10, 20, 30
2. Count on in steps to fill the gaps. Add the step to the number before each gap.
   10, 20, 30, 40, 50
3. Write the missing numbers.
   10 and 30

Check. Check the whole row: 10, 20, 30, 40, 50. Each step is 10.

Watch out. Do not count in ones. Count in steps of 10.

Method. Say the tens part, then the ones part.

1. Find the tens part. The tens digit gives the tens word.
   5 tens = fifty
2. Find the ones part. The ones digit gives the last word.
   2 ones: two ones
3. Write the name. Put a hyphen between the tens word and the ones word.
   fifty-two

Check. Read the name back: fifty-two is 52.

Watch out. Use a hyphen between tens and ones, for example forty-six.

Method. Say the number name for each numeral from 0 to 20.

1. Look at the numeral. It is less than 21.
   11
2. Say its name. Each number from 0 to 20 has its own name.
   eleven
3. Write the answer.
   eleven

Check. Count to 11 and stop on eleven.

Watch out. Some teen names look alike. Thirteen and thirty are different numbers.

Method. Say the number name and find its numeral.

1. Say the number name. Listen to the whole word.
   seven
2. Find the numeral. seven is the number 7.
   seven = 7
3. Write the numeral.
   7

Check. Count to 7 and check you say seven at the end.

Watch out. Thirteen is 13: the 3 is at the end, as in the ones word.

Method. Find the tens first, then the ones.

1. Find the tens word. The tens word tells us how many tens.
   eighty = 8 tens
2. Find the ones word. The ones word tells us the ones digit.
   one = 1
3. Write the numeral. Tens digit first, then ones digit.
   81

Check. Say 81 as a number name to check: eighty-one.

Watch out. Write the tens digit first. Seventy-four is 74, not 47.

Method. The tens digit tells us the tens. The ones digit tells us the ones.

1. Look at the first digit. It is the number of tens.
   6 tens
2. Look at the second digit. It is the number of ones.
   9 ones
3. Write the answer. Say the tens, then the ones.
   6 tens and 9 ones

Check. 6 tens is 60, and 60 + 9 = 69.

Watch out. Read the digits from left to right. The left digit is the tens.

Method. The tens digit tells us the tens. The ones digit tells us the ones.

1. Look at the first digit. It is the number of tens.
   1 tens
2. Look at the second digit. It is the number of ones.
   7 ones
3. Write the answer. Say the tens, then the ones.
   1 tens and 7 ones

Check. 1 tens is 10, and 10 + 7 = 17.

Watch out. Read the digits from left to right. The left digit is the tens.

Method. The tens digit tells us the tens. The ones digit tells us the ones.

1. Look at the first digit. It is the number of tens.
   2 tens
2. Look at the second digit. It is the number of ones.
   5 ones
3. Write the answer. Say the tens, then the ones.
   2 tens and 5 ones

Check. 2 tens is 20, and 20 + 5 = 25.

Watch out. Read the digits from left to right. The left digit is the tens.

Method. Say the number name for each numeral from 0 to 20.

1. Look at the numeral. It is less than 21.
   13
2. Say its name. Each number from 0 to 20 has its own name.
   thirteen
3. Write the answer.
   thirteen

Check. Count to 13 and stop on thirteen.

Watch out. Some teen names look alike. Thirteen and thirty are different numbers.

Method. Find the tens first, then the ones.

1. Find the tens word. The tens word tells us how many tens.
   eighty = 8 tens
2. Find the ones word. The ones word tells us the ones digit.
   four = 4
3. Write the numeral. Tens digit first, then ones digit.
   84

Check. Say 84 as a number name to check: eighty-four.

Watch out. Write the tens digit first. Seventy-four is 74, not 47.