One-Step Equation (Addition)
One-Step Equation (Subtraction)
Operations
100

 x + 7 = 13

What is x=6?

100

 x - 7 = 13

What is x=20?

100
If you are increasing a number, what mathematical operation do you use?
addition
200
a + 3 = 24
What is a=21?
200
x - 3 = 24
What is x=27?
200
If you are decreasing a number, what mathematical operation do you use?
subtraction
300
m + 89 = 108
What is m=19?
300

m - 27 = 94

What is m=121?

300

It is the opposite operation of subtraction.

What is addition?

400
t + 78 = 88
What is t=10?
400
p - 89 = 108
What is p=197?
400
It is the opposite operation of addition.
What is subtraction?
500
p + 155 = 174
What is p=19?
500
t - 78 = 93
What is 171?
500

We use ________ _________ to help us solve equations.

inverse operations

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