Bonita thought of a number and divided it by 8.

What can she do to get back her original number?

A. Divide by 8 again

B. Subtract 8

C. Multiply by 8

D. Add 8

Answer: C. multiply by 8 because multiply is backwards division

Multiply by 8

Step-by-step explanation:

To undo an arithmetic operation, such as division, an inverse operation needs to be applied, in this case multiplication.

Let x denote the number Bonita thought of. She then divided it by 8, so the result was x/8. She then, for some reason, forgot the original number x but still had access to x/8 and still remembered that she divided by 8. She can get the orginal number, x, by multiplying: (x/8) * 8=x.

Multiplication and Division are mutually inverse. Addition and Subtraction are another example of mutually inverse operations.