Multiplying and Dividing Rational Numbers

Outcomes

100

The product of 2 positives will be

positive

200

The quotient of a negative and a positive will be

Negative

300

DAILY DOUBLE!!!

What is the rule for finding the sign of a multiplication or division problem?

400

(+) x (-) x (+)

Negative

500

(-) x (+) x (-) x (+) x (+)

Positive

Multiplying

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

Dividing

100

-14 / -2

7

200

864 / -16

-54

300

-7.5 / -0.06

125

400

6 1/3 ÷ -1/4

-6 1/12

500

-1.9 / .004

-475

Word Problems

100

Ty dives 3 ft below water on 7 different occasions. What is the total depth he dove

21 feet below water

200

Lisa begins the day with $20 in her account. She gets 4 checks for $13 each and 2 bills for 20 each. What is her ending balance

$32

300

The temperature in NYC decreased at a constant rate from 15°F to -15°F in 3 hours. How many degrees did the temperature decrease by per hour?

10 degrees per hour

400

Sam gets paid $8.50 per hour. On Tuesday, he works for 8 hours, and then buys 2 shirts for $10.50 each. How much money does he end the day with

$47.00

500

Yolanda burns 90 calories for every 3 hours she runs. If she runs for 18 hours throughout the week for 2 weeks. How many total calories will she burn?

1080 calories in 2 weeks

Mixed

100

- 95 ÷ -5 +3

22

200

(-14)÷(2)(3)

-21

300

-6 + -21/-7

-3

400

Convert 4 4/5 to a decimal

4.8

500

Convert 2 5/8 to a decimal

2.625