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You add 0.6 to 6.4 to make 7.

Addition and Subtraction (Year 5)

By Year 5, pupils solve bigger addition and subtraction problems with confidence. They use written methods, mental strategies, and checking skills to ensure their answers are accurate.

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Fascinating Fact:

You can check subtraction by using addition: if 4,328 - 2,157 = 2,171, then 2,171 + 2,157 = 4,328.

In KS2 Maths, Year 5 pupils develop accuracy with larger numbers. They practise both mental and written strategies, and learn to use inverse operations to check their work.

Key Terms

Inverse: An opposite operation, such as addition being the inverse of subtraction.
Written Method: A structured way of setting out calculations, like the column method.
Mental Strategy: Using quick thinking and number facts to solve a problem without writing it down.

Frequently Asked Questions (Click to see answers)

How can I check my subtraction answers?

You can add the answer to the smaller number. If it equals the starting number, your subtraction is correct.

What is the best method for large numbers?

The column method is usually best for large numbers because it keeps place value clear and reduces mistakes.

Why do we learn mental strategies as well as written ones?

Mental strategies are useful for quick checks and everyday situations, while written methods are reliable for bigger or more complex problems.

Try These Related Quizzes

1 .

Which of these pairs does not total 100?

28 + 72

39 + 61

17 + 83

57 + 53

57 + 53 = 110

2 .

What would you add to 6.4 to make 7?

0.4

0.6

0.7

1.6

The best way to work this out is to take 6.4 from 7, which would give you the answer 0.6

3 .

Which of these pairs would not total 700?

673 + 37

654 + 46

687 + 13

648 + 52

673 + 37 = 710

4 .

Which number sentence is incorrect?

875 - 56 = 819

819 + 56 = 875

56 + 819 = 875

819 - 56 = 875

The correct number sentence would be 875 - 819 = 56

5 .

Which is the best method of calculating 1.5 + 1.6?

Double 1.5 add 0.1

Double 1.5 add 1

Double 1.5 subtract 1

Double 1.5 subtract 0.1

1.5 x 2 = 3.0
3.0 + 0.1 = 3.1
so 1.5 + 1.6 = 3.1

6 .

Which of these pairs does not total 1?

0.2 + 0.8

0.4 + 0.6

0.7 + 0.3

0.1 + 0.8

1 + 8 = 9
so 0.1 + 0.8 = 0.9

7 .

Which is the best method of calculating the missing number in this problem: ___ - 23 = 176?

176 - 23

176 + 23

23 - 176

123 - 76

176 + 23 = 199
so 199 - 23 = 176

8 .

What is the best method of subtracting 79?

Add 80 subtract 1

Add 80 add 1

Subtract 80 subtract 1

Subtract 80 add 1

e.g. 456 - 79 so 456 - 80 = 376 + 1 = 377

9 .

How would you calculate 3,004 - 2,898?

Double 3,000 then adjust

Count in 1s from 2,898 to 3,004

Count up in 3 steps from 2,898 to 3,004

Count up in 5 steps from 2,898 to 3,004

e.g. 2,898 + 2 = 2,900 + 100 = 3,000 + 4 = 3,004 so 3 steps gives the answer 106

10 .

Which strategy would be best to calculate 347 + 97?

Add 100 to 347 subtract 3

Add 100 to 347 add 3

Subtract 100 from 347 add 3

Subtract 100 from 347 subtract 3

347 + 100 = 447
447 - 3 = 444
so 347 + 97 = 444

You can find more about this topic by visiting BBC Bitesize - Adding and subtracting

Author: Amanda Swift (Primary School Teacher & Educational Content Developer)

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