CPM Homework Help : CC1MN Problem 9-86

Recall that inverse operations “undo” each other. Write the inverse operation for each situation below.

Hint:

Addition and subtraction are inverse operations.
For example, adding 4 and then subtracting 4 takes you back to your original number.

Multiplication and divsion are also inverse operations.
For example, multiplying a number by 4 and then dividing by 4 takes you back to your original number.

Add $\frac { 3 } { 4 }$ .
Answer (a):
$\text{Subtract}\ \frac{3}{4}.$

Subtract $1\frac { 2 } { 3 }$ .
More Help (b):
If subtraction and addition are inverse operations, how much do you have to add?

Divide by $8$ .
Answer (c):
Multiply by 8.

Multiply by $12$ .
More Help (d):
If multiplication and division are inverse operations, how much do you have to divide by?