Inverse Operations

We are beginning with Inverse Operations.

Inverse Operations/Equations help you solve a problem with an unknown variable. It is an equation that is part of the fact family.

     Variables: letters, shapes, symbols that represent another number.

Add/Subtract
Problem: 4 + R = 10
   
Fact Family: R + 4 = 10
                     10 - R = 4
                     10 - 4 = R

Inverse Operation/Equation:   10 - 4 = R

Now you can find the answer 10 take away 4 = 6. R=6.

Multiply/Divide
Problem: 6 x N = 18

Fact Family: N x 6 = 18
                     18 / N = 6
                     18 / 6 = N

Inverse Operation/Equation:    18/6=N

Now you can skip count to find the answer.    6, 12, 18.     N=3