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100

What operation would you use to solve this equation, x + 7 = 13

subtraction

100

What operation would you use to solve this equation, x - 7 = 13

addition

100

What operation would you use to solve this equation, 7x = 21

What is division?

100

What operation would you use to solve this equation, x ÷ 4 = 4

What is multiplication?

100
If you are increasing a number, what mathematical operation do you use?
addition
200

a + 3 = 24

 a=21

200

x - 3 = 24

 x=27

200

5b = 15

b=3

200

b ÷ 3 = 5

 b=15

200

x/ 3 = 4

12

300

m + 89 = 108

 m=19

300

m - 27 = 94

 m=121

300

2d = 150

 d=75

300

p ÷ 4 = 4

 p=16

300

x/20 = -10

x = -300

400

t + 78 = 88

 t=10

400

p - 89 = 108

 p=197

400

6c = 36

 c=6

400

n ÷ 6 = 9

 n=54

400

x/9 =8

x = 72

500

p + 155 = 174

p=19

500

t - 78 = 93

171

500

14e=84

 e=6

500

g ÷ 4 = 12

g=48

500

2x/ 5 = 1

x= 5 /2