Download PowerPoint: Solving One

REVIEW
Inverse Operations
For each equation, write the inverse operation needed to
solve for the variable. Then, check your answer!
a.) y + 7 = 14
c.) 5 - s = 25
tap
subtract
7
tap
subtract
5
b.) a - 21 = 10
d.) x – (-3)
=5
tap
add 21
tap
subtract
3
REVIEW
Solving One Step
Addition & Subtraction
Equations
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
Examples:
y + 9 = 16
- 9 -9 The inverse of adding 9 is subtracting 9
y=7
m - 16 = 4
+16 +16 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!!!
One Step Equations (with + and -)
Solve each equation then click the box to see work & solution.
x + 8 = 12
-click8to show
-8
inverse operation
x=4
x + 2 = 14
-2 -2
click to show
inverse
x =operation
12
x - 23 = 43
+23
click to+23
show
operation
xinverse
= 66
x - 18 = 51
+18
click to+18
show
inverse operation
x = 69
x-4=7
+4click+4
to show
xinverse
= 11operation
x + 5 = 13
- 5to show
-5
click
inverse operation
x=8
click to show
inverse operation
NOW…
Solving One Step
Multiplication & Division
Equations
What is the INVERSE operation for:
Addition?
Subtraction?
Multiplication?
Division?
click to show
inverse operation
Subtraction
click to show
inverse operation
Addition
click to show
inverse operation
Division
click to show
inverse operation
Multiplication
Examples:
6m = 72
6
6
m = 12
The inverse of multiplying by 6 is dividing by 6
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!!!
One Step Equations (mult & div)
Solve each equation in your journal or on a whiteboard.
Then, check your answers below!
3x = 15
3
3
x=5
click to show
inverse operation
4m = 12
4
4
mshow
=3
click to
inverse operation
25 = 5n
5
5
5=n
click to show
inverse operation
m = 12
2
2 x m = 12 x 2
2
click to show
m operation
= 24
inverse
x=7
5
5x = 7 x 5
5 click to show
x inverse
= 35 operation
4=x
6
6 x 4 = 6x
6
click to show
inverse
24 = operation
x