Mathematics
Grade-1
Easy
Question
Find the missing number.
90 – ___ = 10
- 60
- 70
- 80
- 50
The correct answer is: 80
To find the missing number, count back from 90 till we get 10.
90, 80, 70, 60, 50, 40, 30, 20, 10
We counted back 8 tens which is 80.
So, the missing number is 80.
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