Year 1 Numbers to 10: check-up and quiz

Key words. To count is to say one number for each thing, in order: 1, 2, 3, and so on.

Method. Say one number for each one, and touch each one only once. The last number you say is how many there are.

1. Count each one and say its number. Each one gets one number. Do not miss one and do not count one twice.
   1, 2, 3, 4, 5, 6
2. Look at the last number you said. The last number tells us how many there are altogether.
   The last number is 6.
3. Write the answer.
   There are 6 apples.

Check. Count again from the other side. You get 6 again. ✓

Watch out. Move each one to one side as you count it, so you do not lose your place.

Method. Read the number word, then find it on the number list.

1. Read the word. Read the whole word, not just the first letters.
   “nine”
2. Find the word on the number list. Each word matches exactly one number.
   nine = 9
3. Write the numeral. A numeral is the number written with digits.
   9

Check. Count 9 things. The last number you say is 9. ✓

Watch out. Check the spelling of the word before you write the numeral.

Key words. A numeral is a number written with digits, like 7. A number word is its name, like seven.

Method. Say the number out loud, then write its name in words.

1. Say the number. Listen to how it sounds.
   3
2. Find its name on the number list. Every number has one name.
   3 = three
3. Write the word, one letter at a time. The word has 5 letters.
   three

Check. Count out 3 things and say “three” at the end. ✓

Watch out. Look at the whole word. “Six” and “seven” both start with s but they are different numbers.

Key words. One more is the next number. One less is the number just before.

Method. Start at 6. One more is the number after 6.

1. Start at 6. Put your finger on the number.
   Start: 6
2. Move one step forward. Each step on the number line is one number.
   6 + 1 = 7
3. Write the answer.
   7

Check. Check it: 7 − 1 = 6. ✓

Watch out. Move one step, not two. Do not write the number you started with.

Key words. One more is the next number. One less is the number just before.

Method. Start at 5. One less is the number before 5.

1. Start at 5. Put your finger on the number.
   Start: 5
2. Move one step back. Each step on the number line is one number.
   5 − 1 = 4
3. Write the answer.
   4

Check. Check it: 4 + 1 = 5. ✓

Watch out. Move one step, not two. Do not write the number you started with.

Key words. More means a bigger number. Fewer means a smaller number. The same means equal.

Method. Count each group, then see which number is bigger.

1. Count group A. Touch each one once.
   Group A: 7 stars
2. Count group B. Touch each one once.
   Group B: 4 apples
3. Compare the two numbers. The bigger number has more. The smaller number has fewer.
   7 > 4
4. Write the answer.
   Group A has more stars.

Check. Match one to one: each thing in one group gets a partner from the other. The group with a thing left over has more. ✓

Watch out. Groups can look bigger when the things are spread out. Always count them.

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

Method. Smallest first. Look at where each number sits on the number line.

1. Find each number on the number line. Numbers further to the left are smaller.
2. Put the numbers in order. Start with the smallest and go to the next one.
   2, 4, 6, 9
3. Write the numbers.
   2, 4, 6, 9

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

Watch out. Check you have not left a number out.

Key words. Between means in the middle of two numbers.

Method. The number between 6 and 8 sits in the middle of them.

1. Find 6 and 8 on the number line. Put your finger on each one.
2. Count on one from the smaller number. The number in the middle is one more than the smaller one.
   6 + 1 = 7
3. Write the answer.
   7

Check. Count on from 7 to 8: 7 + 1 = 8. ✓

Watch out. The number between is not one of the two numbers you started with.

Method. Count back from 10 to 7. Each number is one less than the number before it.

1. Start at the first number. We start with the biggest number.
   10
2. Take away one each time. Each number is one less than the one before.
   10, 9, 8, 7
3. Write the numbers. Include the start number and the end number.
   10, 9, 8, 7

Check. Count on from 7 to 10 to check. ✓

Watch out. Count backwards in the same way each time. Do not skip a number.

Key words. Zero means none at all. We write it as 0.

Method. When there is nothing to count, the answer is zero.

1. Look inside the empty box. Check every place a thing could be.
   There are no balls.
2. Say the number for nothing. Zero means there are none.
   Nothing to count, so the answer is zero.
3. Write the answer.
   0

Check. Zero is a number, and we write it as 0. ✓

Watch out. Zero is a number, not an empty answer. Write 0 when there are none.

Key words. One more is the next number. One less is the number just before.

Method. Start at 8. One more is the number after 8.

1. Start at 8. Put your finger on the number.
   Start: 8
2. Move one step forward. Each step on the number line is one number.
   8 + 1 = 9
3. Write the answer.
   9

Check. Check it: 9 − 1 = 8. ✓

Watch out. Move one step, not two. Do not write the number you started with.

Method. Read the number word, then find it on the number list.

1. Read the word. Read the whole word, not just the first letters.
   “seven”
2. Find the word on the number list. Each word matches exactly one number.
   seven = 7
3. Write the numeral. A numeral is the number written with digits.
   7

Check. Count 7 things. The last number you say is 7. ✓

Watch out. Check the spelling of the word before you write the numeral.

Key words. To count is to say one number for each thing, in order: 1, 2, 3, and so on.

Method. Say one number for each one, and touch each one only once. The last number you say is how many there are.

1. Count each one and say its number. Each one gets one number. Do not miss one and do not count one twice.
   1, 2, 3, 4, 5, 6, 7, 8
2. Look at the last number you said. The last number tells us how many there are altogether.
   The last number is 8.
3. Write the answer.
   There are 8 stars.

Check. Count again from the other side. You get 8 again. ✓

Watch out. Move each one to one side as you count it, so you do not lose your place.

Key words. More means a bigger number. Fewer means a smaller number. The same means equal.

Method. Count each group, then see which number is smaller.

1. Count group A. Touch each one once.
   Group A: 3 balls
2. Count group B. Touch each one once.
   Group B: 6 cubes
3. Compare the two numbers. The bigger number has more. The smaller number has fewer.
   3 < 6
4. Write the answer.
   Group A has fewer balls.

Check. Match one to one: each thing in one group gets a partner from the other. The group with a thing left over has more. ✓

Watch out. Groups can look bigger when the things are spread out. Always count them.

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

Method. Smallest first. Look at where each number sits on the number line.

1. Find each number on the number line. Numbers further to the left are smaller.
2. Put the numbers in order. Start with the smallest and go to the next one.
   3, 5, 8, 10
3. Write the numbers.
   3, 5, 8, 10

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

Watch out. Check you have not left a number out.

Method. Count back from 9 to 5. Each number is one less than the number before it.

1. Start at the first number. We start with the biggest number.
   9
2. Take away one each time. Each number is one less than the one before.
   9, 8, 7, 6, 5
3. Write the numbers. Include the start number and the end number.
   9, 8, 7, 6, 5

Check. Count on from 5 to 9 to check. ✓

Watch out. Count backwards in the same way each time. Do not skip a number.

Method. Each number is one more than the number before it. Use the numbers you can see to find the gaps.

1. Look at the numbers before each gap. Counting on in ones means each number is one more than the one before.
   4, ?, 6, ?, 8
2. Count on one from the number before each gap. Add 1 to the number before the gap.
   Gap 2: 4 + 1 = 5
   Gap 4: 6 + 1 = 7
3. Write the missing numbers.
   5, 7

Check. Read the whole line again: each number is one more than the one before. ✓

Watch out. Check the numbers after the gap too. They should still go up by one.

Method. One less than 10 is found by counting back one from 10.

1. Start at 10. We start with the number 10.
   10
2. Count back one. One less is the number before.
   10 − 1 = 9
3. Write the answer. Mei said 11, which is one more, not one less.
   No. One less than 10 is 9.

Check. One more than 9 is 10, so 9 is one less than 10. ✓

Watch out. One less goes down, one more goes up.

Key words. Between means in the middle of two numbers.

Method. The number between 4 and 6 sits in the middle of them.

1. Find 4 and 6 on the number line. Put your finger on each one.
2. Count on one from the smaller number. The number in the middle is one more than the smaller one.
   4 + 1 = 5
3. Write the answer.
   5

Check. Count on from 5 to 6: 5 + 1 = 6. ✓

Watch out. The number between is not one of the two numbers you started with.

Method. Compare Ravi’s marbles with Aisha’s marbles.

1. Count Ravi’s marbles. Ravi has 4 marbles.
   Ravi: 4
2. Count Aisha’s marbles. Aisha has 9 marbles.
   Aisha: 9
3. Compare the numbers. The smaller number has fewer.
   4 is smaller than 9
4. Write the answer.
   Ravi has fewer marbles, because 4 is less than 9.

Check. Count from 4 to 9 on a number line. Ravi’s number is closer to 0, so it is smaller. ✓

Watch out. The smaller number is the number with fewer things.