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Miscellaneous
Multiplication & Addition
Multiplication & Subtraction
Division & Addition
Division & Subtraction
100

The four basic operations

Addition, Subtraction, Multiplication & Division

100

k + 5 = 17

k = 12

100

a - 5 = 4

a = 9 

100

m/5 = 12

m = 60

100

z/6 = 2

z = 12


200

The opposite of addition

subtraction or minus

200

2a + 11 = 35

a = 12

200

5m - 7 = 23

m = 6 

200

y/8 + 4 = 20

y = 32

200

y/9 - 6 = 5

y = 99

300

A letter used to represent an unknown number

Variable

300

2r + 39 = 65

r = 13

300

6k - 5 = 43

k = 8

300

k/8 + 21 = 97

k = 608

300

z/6 - 14 = 3

z = 102

400

A number right in front of a variable

Coefficient

400

12s + 27 = 171

s = 12

400

4j - 71 = 29

j = 25

400

g/11 + 37 = 128

g = 1188

400

y/9 - 18 = 52

y = 630

500

Given that:

C = 2pir

Find r when C = 45

r = 7.16

500

19b + 314 = 1663

b = 71

500

21q - 39 = 234

q = 13

500

w/317 + 596 = 1,639

w = 330,631

500

d/10 - 83 = 64

d = 1470