1. REVIEW Inverse Operations
For each equation, write the inverse operation needed to solve for the variable. Then, check your answer!
a.) y + 7 = subtract 7 b.) a - 21 = add 21
c.) 5 - s = subtract 5 d.) x – (-3) = 5 subtract 3
tap
tap
tap
tap

2. Addition & Subtraction Equations
REVIEW
Solving One Step
Addition & Subtraction 
Equations

3. To solve equations, you must use inverse operations in order to isolate the variable on one side of the equation.
Whatever you do to one side of an equation, you MUST do to the other side! +5 +5

4. Examples:
y + 9 = 16
The inverse of adding 9 is subtracting 9
y = 7
m - 16 = 4
The inverse of subtracting 16 is adding 16
m = 20
Remember - whatever you do to one side of an equation, you
MUST do to the other!!!

5. One Step Equations (with + and -)
Solve each equation then click the box to see work & solution.
x + 8 = 12
x = 4
x - 23 = 43
x = 66
x - 18 = 51
x = 69
x - 4 = 7
+4 +4
x = 11
click to show
inverse operation
click to show
inverse operation
click to show
inverse operation
x + 2 = 14
x = 12
click to show
inverse operation
click to show
inverse operation
x + 5 = 13
x = 8
click to show
inverse operation
click to show
inverse operation

6. Solving One Step Multiplication & Division Equations
NOW…
Solving One Step Multiplication & Division Equations

7. What is the INVERSE operation for: Addition? Subtraction
Subtraction? Addition
Multiplication? Division
Division? Multiplication
click to show
inverse operation
click to show
inverse operation
click to show
inverse operation
click to show
inverse operation

8. Examples:
6m = 72
The inverse of multiplying by 6 is dividing by 6
m = 12
2 x m = 3 x 2 The inverse of dividing by 2 is multiplying by 2 2
m = 6
Remember - whatever you do to one side of an equation,
you MUST do to the other!!!

9. One Step Equations (mult & div)
Solve each equation in your journal or on a whiteboard.
Then, check your answers below!
3x = 15
x = 5
4m = 12
m = 3
25 = 5n
5 = n
m = 12 2
2 x m = 12 x 2
m = 24
x = 7 5
5x = 7 x 5
x = 35
4 = x 6
6 x 4 = 6x
24 = x
click to show
inverse operation
click to show
inverse operation
click to show
inverse operation
click to show
inverse operation
click to show
inverse operation
click to show
inverse operation