Addition
Subtraction
Multiplication
Division
Equation Rules
100
x + 4 = 25
What is 21
100
x - 2 = 6
What is 8
100
9x = -27
What is -3
100

y/6 = 2

What is 12

100

The definition of inverse. 

What is opposite?

200
a + 13 = 10
What is -3
200
d - 7 = -9
What is -2
200

7x = 63

What is 9

200
x/4 = -14
What is -56
200

The four types of operations. 

What is addition, subtraction, multiplication, and division?

300

n + 9 = 14

What is 5

300

k - 83 =121

What is 204

300

5e = 400

What is 80

300
x/6 = -6
What is -36
300
The inverse of addition. 

What is subtraction?

400
x + 36 = -100
What is -136
400
x - 327 = -665
What is -338
400

11x = 275

What is 25

400

28 = a/13

What is 364

400

The inverse of multiplication. 

What is division?

500

 c + 27 = 27

What is 0

500

a -163 = 392

What is 555

500

21y = 756

What is 36

500

80 = x/15

What is 1200

500

The inverse of division. 

What is multiplication? 

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