In this worksheet, you must work out the missing number in an addition sum.
Example
Find out the value of the missing number.
25 | + | = | 28 |
Answer
The opposite of adding is taking away.
We can work this out by doing 28 - 25 = 3
Or we can count on from 25.....26, 27, 28 ........ that's 3 numbers.
So, the answer is 3