we will be finding the missing number in a calculation.
Example
Find the number that makes the calculation correct.
4,740 + __ = 6,000
Answer
The opposite (inverse) of adding is subtracting.
So we work out 6,000 – 4,740 = 1,260
Here is another example
2,365 + ___ = 4,000
Use the inverse operation to solve.
4,000 – 2,365 = 1,635
