KS2 Maths Quiz
Double 47 is 94.

# Addition and Subtraction (Year 4)

In year Four, the second year in KS2, children will be exposed to more difficult addition and subtraction problems in Maths, such as four figure numbers or negatives. They will however be taught the best methods to use to work out the answers to these problems.

Addition and subtraction is adding numbers together or taking them away from each other. Knowing how to work out addition and subtraction problems comes in very handy when dealing with money in everyday life. Imagine that you have £10 and wish to buy two items that cost £3.47 and £6.91... do you have enough money? Well, £3.47 + £6.91 = £10.38 so you'd be 38p short! See how important it is to be able to add and subtract?

Test your knowledge of addition and subtraction by playing the following Year Four quiz.

1. Which strategy would be best to calculate 827 + 6?
Most maths problems can be made simpler
2. What is the sum of 37 + 28?
Add the 10s first and then the units
30 + 20 = 50
then 7 + 8 = 15
then 50 + 15
3. What is the best method of subtracting 21?
e.g. 56 - 21 so:
56 - 20 = 36
then 36 - 1 = 35
4. Which is a good strategy for adding 19?
e.g. 46 + 19 so:
46 + 20 = 66
then 66 - 1 = 65
5. What would we add to 56 to total 100?
100 - 56 = 44
6. What is double 47?
40 x 2 = 80 and 7 x 2 = 14
80 + 14 = 94
7. Which is the best strategy to calculate 38 + 37?
2 x 8 = 16 and 2 x 30 = 60
60 + 16 = 76
76 - 1 = 75
8. What is the missing number in 350 + ___ = 1,000?
100 - 35 = 65
so 1,000 - 350 = 650
9. Which number sentence is incorrect?
The other correct number sentence would be 63 - 28 = 35
10. If we subtract a large number from a small number the total will be?
e.g. 8 - 10 = -2

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