This quiz addresses the requirements of the National Curriculum KS1 Maths and Numeracy for children aged 6 and 7 in year 2. Specifically this quiz is aimed at the section dealing with using known facts to solve missing number problems.
Using facts to solve problems means understanding that subtraction is the inverse of addition, and vice versa. Therefore, if you know that 6 + 4 = 10, you could find the missing number in 10  ? = 4 by using the same numbers.
This quiz will help your child to solve missing number problems by using number facts known to them.














If 4 + 6 = 10, then 10  6 = 4

12 + 8 is a number pair, or bond, to 20


If 7 + 13 = 20, then 20  13 = 7

20  5 = 15, so 15 + 5 = 20


20 + 80 = 100 so 100  80 = 20

If 45 + 55 = 100, you could solve 100  55 = 45


If you know that 100  25 = 75, then you could solve 25 + 75 = 100

100  85 = 15, not 100


The numbers in each calculation should always be 5, 95 and 100

16 + 16 = 32, not 100
