7th Chapter 2 - Multiplying/Dividing Rational Numbers

General Rules

100

(+) x (+) =

(+) or positive

200

(+) x (-) =

-

300

Tell whether the expression is positive or negative without evaluating.

-3/10 * (-8/15)

positive

400

How is multiplying and dividing rational numbers similar to multiplying and dividing integers?

The same rules for signs of integers are applied to rational numbers.

500

Tell whether the expression is positive or negative without evaluating.

-6/5-:(-1/2)*6.3

negative

Multiplying Decimals

100

-4.4 x (-6.02)

26.488

200

-9.4 x (-4.7)

44.18

300

-7.2 x 0.1

-0.72

400

14.5 x 0.75

10.875

500

6 x (-0.05)

-0.3

Dividing Decimals

100

-4.95 ÷ 1.5

-3.3

200

6.4 ÷ (-3.2)

-2

300

-15.4 ÷ (-2.5)

6.16

400

32.436 ÷ (-4.24)

-7.65

500

24.75/2.25

11

Multiplying Fractions

100

9/10 * (-2/3)

-3/5

200

-5/8 * (-4/15)

1/6

300

-2 3/8*(-1 3/5)

19/5 or 3 4/5

400

-12 * 5/8

-15/2 or -7 1/2

500

-3/5 * 2 2/7

-48/35 or -1 13/35

Dividing Fractions

100

-5/6-: 1/6

-5

200

-4/11-: -2/7

14/11 or 1 3/11

300

9/10-:(-1 1/5)

-3/4

400

-4 1/6-:1 1/3

-3 1/8 or -25/8

500

-1/8-: 6 1/10

-5/244

Taylor Swift

100

What is the name of the new album?

The Life of a Showgirl

200

Who is featured on TLOAS?

Sabrina Carpenter

300

How many albums does Taylor Swift currently have?

12!

400

How old will Taylor Swift be in December?

35

500

What is one of Taylor Swift's cat's names?

Olivia, Meredith, Benjamin