Variables, Expressions, and Integers

Add or Subtract Integers

100

(-8) + 22 

14

200

(-2) + 10 + (-3) + 5

10

300

(-72) + (-30)  

-102

400

79 - (-98) 

177

500

Describe and correct the error in finding the difference of -2 and -5.

(-2) - (-5) = (-2) + (-5)

= -7

To subtract a number, add the opposite number; so 

(-2) - (-5) = (-2) +5

= 3

Simplify Expresson

100

1+(6 - 1)(15)

76

200

( 9 x 2)/ l -6 +2 l

6

300

(36/ 9) + 14 - 8

10

400

(28)(2)/(15-7)

7

500

l (-4) ÷ 2 l × (-4)

-8

Order of Operations

100

(8 x 2)/ 4

4

200

6 - (24 + 8) ÷ 2³

2

300

12 ÷ (3 + 4 - 1) x 4

8

400

5 - l 6 - (2⁴- 5) l

0

500

4(20 - 3²) ÷ 4

11

Evaluate Expressions

100

(x²/4) + y - x ;use x = -4 and y = 4

12

200

(y)(xy - 5 - (-3)); use x = 6 and y = -2

28

300

4c + (a/3) - 6; use a = 9 and c = 5

17

400

l y + 1 l  - ((x - x)/6) ; use x = 3 and y = -14

13

500

(q - (-4)p²)/3 ; use p = 5 and q = 8 

36

Multiply or Divide Integers

100

(-2)(-14)

28

200

84 ÷ (-2)

-42

300

6(-22)

-132

400

51/3

17

500

20(-45) / (-9)

100