Addition
Subtraction
Mix
Multiplication
Division
100

x-4=8

x=12

100

x+5=10

x=5

100

x+5=7

x=2


100
x/4=5

x=20

100

2x=20

x=10

200

x-10=8

x=18

200

x+4=5

x=1

200

x-10=21

x=31

200

3=x/5

x=15

200

-4x=28

x=-7

300

x-15=25

x=40

300

x+12=14

x=2

300

x+15=28

x=13

300

x/12=5

x=60

300

9x=54

x=6

400

x-26=20

x=46

400

x+16=24

x=8

400

x/5=6

x=30

400

x/13=4

x=52

400

8x=72

x=9

500

x-42=58

x=100

500

x+4=28

x=24

500

x/52=4

x=208

500

x/25=12

x=300

500

-12x=96

x=-8