Step-by-step Maths Level 1: Pairs that make 5
Part of the Step-by-step Maths Level 1 number bonds to 5 chapter. Chapter overview · whole chapter on one page
Pairs that make 5
The pairs that make 5 are:
0 and 5, 1 and 4, 2 and 3, 3 and 2, 4 and 1, 5 and 0.
Each pair can be turned round. 1 and 4 is the same pair as 4 and 1.
Key ideas
- 0 and 5 make 5.
- 1 and 4 make 5.
- 2 and 3 make 5.
- You can turn a pair round and it still makes 5.
Method. Find the part that goes with 2 to make the whole, 5.
- Start with 2. It is the part we know.2
- Count on to 5. Count on: 3, 4, 5.3, 4, 5
- Write the answer. We counted on 3 steps.3
Check. 2 + 3 = 5. It works.
Watch out. Count on from the known part to the whole.
Method. Find the part that goes with 4 to make 5.
- Start with 4. It is the part we know.4
- Count on to 5. One more makes 5.5
- Write the answer. The missing part is 1.1
Check. 4 + 1 = 5. It works.
Watch out. Count on one from 4: 5.
Method. Add the two numbers. Is the total 5?
- Add 3 and 3. Add the two parts together.3 + 3 = 6
- Compare with 5. The total is 6, not 5.6 is not 5
- Write the answer. No
Check. Count on from 3: 4, 5, 6. The total is 6, not 5.
Watch out. Add the two numbers. Do not just look at them.
Watch out
Watch out. 2 and 2 make 4, not 5. Always add the two numbers to check.
Exam tip
Grown-up tip. Put 5 counters in a cup. Pour some into a second cup. Ask: “How many are in the other cup?” Then turn the cups round.
Exercise 4B Pairs that make 5
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 5 and the known part is 3.5 and 3
- Count on from the known part to the whole. Or take the known part away from the whole.5 - 3 = 2
- Write the missing part. 2
Check. Put the two parts back together: 3 and 2 make 5.
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 5 and the known part is 0.5 and 0
- Count on from the known part to the whole. Or take the known part away from the whole.5 - 0 = 5
- Write the missing part. 5
Check. Put the two parts back together: 0 and 5 make 5.
Watch out. The two parts always add up to the whole.
Method. Add the two numbers together. Do they make 5?
- Add the two numbers. 1 add 2 is the total.1 + 2 = 3
- Compare the total with 5. The pair works only if the total is 5.3 is not 5
- Write the answer. No
Check. Count on from 1 to check: the total is 3. ✓
Watch out. Add the two numbers, do not just look at them.
Method. Add the two numbers and check the total.
- Add the two numbers. Add them in any order.2 + 3 = 5
- Compare with 5. The total must be 5.2 + 3 = 5, so Sam is right.
- Say whether Sam is right. Yes. Sam is right.
Check. Turn the pair round: 3 and 2 also make 5. ✓
Watch out. Check the total, even when the numbers look right.
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 5 and the known part is 3.5 and 3
- Count on from the known part to the whole. Or take the known part away from the whole.5 - 3 = 2
- Write the missing part. 2
Check. Put the two parts back together: 3 and 2 make 5.
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 5 and the known part is 4.5 and 4
- Count on from the known part to the whole. Or take the known part away from the whole.5 - 4 = 1
- Write the missing part. 1
Check. Put the two parts back together: 4 and 1 make 5.
Watch out. The two parts always add up to the whole.
Method. Add the two numbers together. Do they make 5?
- Add the two numbers. 1 add 5 is the total.1 + 5 = 6
- Compare the total with 5. The pair works only if the total is 5.6 is not 5
- Write the answer. No
Check. Count on from 1 to check: the total is 6. ✓
Watch out. Add the two numbers, do not just look at them.
Method. Add the two numbers and check the total.
- Add the two numbers. Add them in any order.0 + 0 = 0
- Compare with 5. The total must be 5.0 + 0 = 0, which is not 5.
- Say whether Sam is right. No. 0 and 0 make 0, not 5.
Check. Count on from 0 to 0 to check the total. ✓
Watch out. Check the total, even when the numbers look right.
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 5 and the known part is 2.5 and 2
- Count on from the known part to the whole. Or take the known part away from the whole.5 - 2 = 3
- Write the missing part. 3
Check. Put the two parts back together: 2 and 3 make 5.
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 5 and the known part is 1.5 and 1
- Count on from the known part to the whole. Or take the known part away from the whole.5 - 1 = 4
- Write the missing part. 4
Check. Put the two parts back together: 1 and 4 make 5.
Watch out. The two parts always add up to the whole.
Method. Add the two numbers together. Do they make 5?
- Add the two numbers. 5 add 4 is the total.5 + 4 = 9
- Compare the total with 5. The pair works only if the total is 5.9 is not 5
- Write the answer. No
Check. Count on from 4 to check: the total is 9. ✓
Watch out. Add the two numbers, do not just look at them.
Method. Add the two numbers and check the total.
- Add the two numbers. Add them in any order.1 + 4 = 5
- Compare with 5. The total must be 5.1 + 4 = 5, so Sam is right.
- Say whether Sam is right. Yes. Sam is right.
Check. Turn the pair round: 4 and 1 also make 5. ✓
Watch out. Check the total, even when the numbers look right.
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 5 and the known part is 1.5 and 1
- Count on from the known part to the whole. Or take the known part away from the whole.5 - 1 = 4
- Write the missing part. 4
Check. Put the two parts back together: 1 and 4 make 5.
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 5 and the known part is 5.5 and 5
- Count on from the known part to the whole. Or take the known part away from the whole.5 - 5 = 0
- Write the missing part. 0
Check. Put the two parts back together: 5 and 0 make 5.
Watch out. The two parts always add up to the whole.
Method. Add the two numbers together. Do they make 5?
- Add the two numbers. 4 add 5 is the total.4 + 5 = 9
- Compare the total with 5. The pair works only if the total is 5.9 is not 5
- Write the answer. No
Check. Count on from 4 to check: the total is 9. ✓
Watch out. Add the two numbers, do not just look at them.
Method. Add the two numbers and check the total.
- Add the two numbers. Add them in any order.0 + 0 = 0
- Compare with 5. The total must be 5.0 + 0 = 0, which is not 5.
- Say whether Sam is right. No. 0 and 0 make 0, not 5.
Check. Count on from 0 to 0 to check the total. ✓
Watch out. Check the total, even when the numbers look right.