Question

There are 16 mystery books 22 history books and 21 science books in a large bookcase. A smaller bookcase has 30 fewer books. How many books are in the smaller bookcase

Answer 1

You have 29 on the smaller case

Explanation:

if you add all the numbers (16, 22, 21) you will get 59

but its asking for the smaller case

so if you take the 59 and subtract 30 from it you get 29