Step-by-step Maths Level 1: Pairs that make 10
Part of the Step-by-step Maths Level 1 number bonds to 10 chapter. Chapter overview · whole chapter on one page
Pairs that make 10
There are eleven pairs that make 10. They start 0 and 10, then 1 and 9, then 2 and 8, and so on.
If you know 3 and 7 make 10, then 7 and 3 make 10 too. Turn the pair round.
Key ideas
- 0 and 10, 1 and 9, 2 and 8, 3 and 7, 4 and 6, 5 and 5.
- The parts can be turned round: 7 and 3 is the same pair as 3 and 7.
- Check each pair by adding the two numbers.
Method. Find the part that goes with 6 to make the whole, 10.
- Start with 6. It is the part we know.6
- Count on to 10. Count on: 7, 8, 9, 10. That is 4 steps.7, 8, 9, 10
- Write the answer. The missing part is 4.4
Check. 6 + 4 = 10. It works.
Watch out. Count on from the known part to 10.
Method. Turning the parts round does not change the total.
- Read the pair. 2 and 8 make 10.2 + 8 = 10
- Turn the pair round. 8 + 2 is the same sum.8 + 2 = 10
- Write the answer. 10
Check. Count on from 8 to 10 to check: 9, 10.
Watch out. You do not need to learn the pairs twice.
Method. Look at the first parts in order. One is missing.
- Look at the first parts. They go 0, 1, 2, 4, 5.0, 1, 2, 4, 5
- Find the missing first part. Three is missing from the list.3 is not there
- Write the missing pair. 3 and 7
Check. 3 + 7 = 10. It is the missing pair.
Watch out. Read the list in order to find the gap.
Watch out
Watch out. 5 and 5 is one pair, not two. It is the only pair where both parts are the same.
Exam tip
Grown-up tip. Use ten cubes. Ask your child to split them into two piles in every way. Write the pairs down in order as you go.
Exercise 5A Pairs that make 10
Non-calculatorMethod. Find the missing part. Ask what goes with the known part to make the whole.
- Look at the whole and the part you know. The whole is 10 and the known part is 8.10 and 8
- Count on from the known part to the whole. Or take the known part away from the whole.10 - 8 = 2
- Write the missing part. 2
Check. Put the two parts back together: 8 and 2 make 10.
Watch out. The two parts always add up to the whole.
Method. Find the missing part. Ask what goes with the known part to make the whole.
- Look at the whole and the part you know. The whole is 10 and the known part is 5.10 and 5
- Count on from the known part to the whole. Or take the known part away from the whole.10 - 5 = 5
- Write the missing part. 5
Check. Put the two parts back together: 5 and 5 make 10.
Watch out. The two parts always add up to the whole.
Method. The order of the two parts does not change the total.
- Read the pair. 4 and 6 make 10.4 + 6 = 10
- Turn the pair round. 6 + 4 is the same sum.6 + 4 = 10
- Write the answer. 10
Check. Count on from 6 to 10 to check. ✓
Watch out. Turning the parts round does not change the total.
Method. Find the missing part. Ask what goes with the known part to make the whole.
- Look at the whole and the part you know. The whole is 10 and the known part is 2.10 and 2
- Count on from the known part to the whole. Or take the known part away from the whole.10 - 2 = 8
- Write the missing part. 8
Check. Put the two parts back together: 2 and 8 make 10.
Watch out. The two parts always add up to the whole.
Method. Find the missing part. Ask what goes with the known part to make the whole.
- Look at the whole and the part you know. The whole is 10 and the known part is 7.10 and 7
- Count on from the known part to the whole. Or take the known part away from the whole.10 - 7 = 3
- Write the missing part. 3
Check. Put the two parts back together: 7 and 3 make 10.
Watch out. The two parts always add up to the whole.
Method. Find the missing part. Ask what goes with the known part to make the whole.
- Look at the whole and the part you know. The whole is 10 and the known part is 6.10 and 6
- Count on from the known part to the whole. Or take the known part away from the whole.10 - 6 = 4
- Write the missing part. 4
Check. Put the two parts back together: 6 and 4 make 10.
Watch out. The two parts always add up to the whole.
Method. The order of the two parts does not change the total.
- Read the pair. 4 and 6 make 10.4 + 6 = 10
- Turn the pair round. 6 + 4 is the same sum.6 + 4 = 10
- Write the answer. 10
Check. Count on from 6 to 10 to check. ✓
Watch out. Turning the parts round does not change the total.
Method. Find the missing part. Ask what goes with the known part to make the whole.
- Look at the whole and the part you know. The whole is 10 and the known part is 1.10 and 1
- Count on from the known part to the whole. Or take the known part away from the whole.10 - 1 = 9
- Write the missing part. 9
Check. Put the two parts back together: 1 and 9 make 10.
Watch out. The two parts always add up to the whole.
Method. Find the missing part. Ask what goes with the known part to make the whole.
- Look at the whole and the part you know. The whole is 10 and the known part is 10.10 and 10
- Count on from the known part to the whole. Or take the known part away from the whole.10 - 10 = 0
- Write the missing part. 0
Check. Put the two parts back together: 10 and 0 make 10.
Watch out. The two parts always add up to the whole.
Method. Find the missing part. Ask what goes with the known part to make the whole.
- Look at the whole and the part you know. The whole is 10 and the known part is 4.10 and 4
- Count on from the known part to the whole. Or take the known part away from the whole.10 - 4 = 6
- Write the missing part. 6
Check. Put the two parts back together: 4 and 6 make 10.
Watch out. The two parts always add up to the whole.
Method. The order of the two parts does not change the total.
- Read the pair. 2 and 8 make 10.2 + 8 = 10
- Turn the pair round. 8 + 2 is the same sum.8 + 2 = 10
- Write the answer. 10
Check. Count on from 8 to 10 to check. ✓
Watch out. Turning the parts round does not change the total.
Method. Find the missing part. Ask what goes with the known part to make the whole.
- Look at the whole and the part you know. The whole is 10 and the known part is 7.10 and 7
- Count on from the known part to the whole. Or take the known part away from the whole.10 - 7 = 3
- Write the missing part. 3
Check. Put the two parts back together: 7 and 3 make 10.
Watch out. The two parts always add up to the whole.
Method. Find the missing part. Ask what goes with the known part to make the whole.
- Look at the whole and the part you know. The whole is 10 and the known part is 5.10 and 5
- Count on from the known part to the whole. Or take the known part away from the whole.10 - 5 = 5
- Write the missing part. 5
Check. Put the two parts back together: 5 and 5 make 10.
Watch out. The two parts always add up to the whole.
Method. Find the missing part. Ask what goes with the known part to make the whole.
- Look at the whole and the part you know. The whole is 10 and the known part is 7.10 and 7
- Count on from the known part to the whole. Or take the known part away from the whole.10 - 7 = 3
- Write the missing part. 3
Check. Put the two parts back together: 7 and 3 make 10.
Watch out. The two parts always add up to the whole.
Method. The order of the two parts does not change the total.
- Read the pair. 3 and 7 make 10.3 + 7 = 10
- Turn the pair round. 7 + 3 is the same sum.7 + 3 = 10
- Write the answer. 10
Check. Count on from 7 to 10 to check. ✓
Watch out. Turning the parts round does not change the total.
Method. Find the missing part. Ask what goes with the known part to make the whole.
- Look at the whole and the part you know. The whole is 10 and the known part is 6.10 and 6
- Count on from the known part to the whole. Or take the known part away from the whole.10 - 6 = 4
- Write the missing part. 4
Check. Put the two parts back together: 6 and 4 make 10.
Watch out. The two parts always add up to the whole.