# Relate Subtraction and Multiplication with Division

a) Division by a number means subtracting that number repeatedly.

**For example**, to find 15 ÷ 3, subtract 3 from 15 repeatedly till you get a zero.

15 – 3 = 12, 12 – 3 = 9, 9 – 3 = 6, 6 – 3 = 3, 3 – 3 = 0

We have subtracted 3 from 15, 5 times to reach at zero.

So, 15 ÷ 3 = 5.

b) Multiplication and division are inverse operations. Multiplication is used to put equal groups together, and division separates one group into several equal groups.

For example:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

### Help

The correct answer is

##### Remember :

The smallest number is the one that comes first while counting.

##### Solution :

To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.

21,27,23

21 is the smallest number.