Show:
Addition
Subtraction
Multiplication
Division
Vocabulary
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

Subtraction: This symbol is used when one number is subtracted from another. _______

-

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

Multiplication: This symbol is used when one number is multiplied by another. ________

x

300
n + (-8) = -14
What is -6
300
k - (-83) =121
What is 38
300
-5e = -400
What is 80
300
x/6 = -6
What is -36
300

Addition: This symbol is used when one number is added to another. _____________

+

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

A letter that represents an unknown quantity is called a ______________. For example: x, a, e.

Variable

500
-27 = c + 27
What is -56
500
a - (-163) = -392
What is -555
500
-21y = -756
What is 36
500
-80 = x/15
What is -1200
500

The _________ operation of subtraction is addition. It is the reverse or opposite. They “undo” or “cancel” each other. 

Inverse