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Inverse Operations
Addition
Subtraction
Multiplication
Division
100

What is the inverse of addition?

Subtraction

100

x + 7 = 45

x=38

100

n - 15 = 8

n=23

100

6n = 30

n = 5

100

n/2 = 6

n = 12

200

What is the inverse of subtraction?

Addition

200

x + 3 = 104

x = 101

200

m - 32 = 98

m = 130

200

8t = 64

t = 8

200

t/4 = 27

t = 108

300

What is the inverse of division?

Multiplication

300

9.8 + e = 78.6

68.8

300

y - 71.8 = 2.8

y = 74.6

300

4.5y = 45

y = 10

300

y/4.5 = 36

y = 162

400

What is the inverse of Multiplication?

Division
400

(1/2) + x = (9/2)

x = 8/2

400

n - (3/4) = (13/4)

n = 16/4

400

(3/4)n = (9/16)

n = 3/4

400

t/15 = 5

t = 75

500

(4/5) + y = (25/10)

x = 17/10

500

m - (1/2) = (2/3)

m = 7/6
500

15.7b = 188.4

b = 12

500

m/5.5 = 111.1

m = 20.2