In this activity, we will be finding the missing number to make the total of 1,000.
Find the number that makes the calculation correct.
380 + __ = 1,000
The opposite (inverse) of adding is subtracting.
So we work out 1,000 - 380
We can do this in stages 1,000 - 300 = 700
700 - 80 = 620
Does that make sense?
Let's practise this in the following questions.