In Year 4, the second year in KS2 Maths, you'll tackle some tricky addition and subtraction problems. We're talking about big numbers and even negative numbers! But don't worry, you'll learn super cool ways to solve them.

Addition is when you add numbers, and subtraction is when you take them away. It's like having £10 and wanting to buy things that cost £3.47 and £6.91. You'd have £10.38, but you'd be 38p short. See how useful adding and subtracting is in real life?

Test your skills with the Year Four quiz!

Click to See How Quizzes Help Learning1.

Which number sentence is incorrect?

28 + 35 = 63

63 - 35 = 28

35 + 28 = 63

28 - 35 = 63

The other correct number sentence would be 63 - 28 = 35

2.

What is the missing number in 350 + ___ = 1,000?

450

550

650

750

100 - 35 = 65

so 1,000 - 350 = 650

so 1,000 - 350 = 650

3.

Which strategy would be best to calculate 827 + 6?

Add 20 to 827 then subtract 14

Add 3 to 827 to make 830 then add 3

Count 827 on from 6

Subtract 10 from 827 then add 4

Most maths problems can be made simpler

4.

What is the best method of subtracting 21?

Add 20 subtract 1

Subtract 20 add 1

Add 20 add 1

Subtract 20 subtract 1

e.g. 56 - 21 so:

56 - 20 = 36

then 36 - 1 = 35

56 - 20 = 36

then 36 - 1 = 35

5.

What is double 47?

84

87

92

94

40 x 2 = 80 and 7 x 2 = 14

80 + 14 = 94

80 + 14 = 94

6.

Which is a good strategy for adding 19?

Add 20 and take away 11

Add 20 and take away 1

Take away 20 add 1

Take away 20 add 11

e.g. 46 + 19 so:

46 + 20 = 66

then 66 - 1 = 65

46 + 20 = 66

then 66 - 1 = 65

7.

What is the sum of 37 + 28?

9

63

65

75

Add the 10s first and then the units

30 + 20 = 50

then 7 + 8 = 15

then 50 + 15

30 + 20 = 50

then 7 + 8 = 15

then 50 + 15

8.

What would we add to 56 to total 100?

44

45

54

64

100 - 56 = 44

9.

If we subtract a large number from a small number the total will be?

A fraction

A decimal

A multiple

A negative number

e.g. 8 - 10 = -2

10.

Which is the best strategy to calculate 38 + 37?

Count on 37 from 38

Double 38 and subtract 1

Add 50 to 38 then subtract 13

Multiply 38 by 3 subtract 39

2 x 8 = 16 and 2 x 30 = 60

60 + 16 = 76

76 - 1 = 75

60 + 16 = 76

76 - 1 = 75

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