Multiplying and Dividing Rational Numbers

Multiplication

100

-12 x (-3)

36

200

64 x (-4)

-256

300

-9.84 x (-0.03)

0.2952

400

(-5/7) x (-6/9)

10/21

500

-9.74 x 0.54

-5.2596

Division

100

-14 ÷ (-2)

7

200

864 ÷ (-16)

-54

300

- 2/3 ÷ - 4/5

10/12 = 5/6

400

6 1/3 ÷ (-1/4)

-25 1/3

500

-1.9 ÷ 0.004

-475

Order of Operations

100

2 + 3(5-1)

14

200

Simplify the expression. (-3)² + (-4 + -3) + 2 x 5

12

300

Simplify the expression. 4.5(-2) - 10 + 2 x 3

-13

400

Solve the following expression: 

14 - 10 + 3 x -4

        (-2)²

-2

500

(4 + 3 x 4) - 14 ÷ 2 x 3 + 10

5

Convert Fractions/Decimals

100

Convert 0.45 to a fraction. Remember to simplify!

45/100 = 9/20

200

Convert 5/8 to a decimal

0.625

300

Convert -2.35 to a fraction. Remember to simplify!

-2  35/100 =  -2  7/20

400

Convert -2  3/5 to a decimal

-2.6

500

Convert 0.245 to a fraction. Remember to simplify!

245/1000 = 49/200

Problem Solving

100

True or False: The product of a negative number and a positive number is sometimes positive. 

False!  Positive x Negative = Negative

           Negative x Positive = Negative

200

Five people are playing a game. Their scores were -4, -1, 2, 5, 5 Find the mean (average) score.

1.4

300

The temperature changes for Monday through Friday were 10, -3, -12, 8, and 12. What was the mean (average) change in temperature? 

10 + -3 + -12 + 8 + 12 = 15/5 = 3

400

Evaluate the following expression if x = 2, y = -4, z=-8

zx/y

(-8)(2)/-4 = -16/-4 =    4

500

Evaluate the following expression if x = 2, y = -4, z=-8

 z - 2x

   y

-8 - 2(2)     = -8-4 = -12/-4 =      3

   -4                 -4