Rational Numbers

Dividing Rational #'s

100

What result do you get when you divide a negative by a negative?

A positive answer

200

8.2 divided by -4

-2.05

300

-2/3 divided by 1/2

-1 1/3 or -4/3

400

-8/9 divided by -4/9

2

500

-1 3/8 divided by 1/8

-11

Multiplying Rational #'s

100

What result do you get when you multiply a positive times a negative?

A negative answer

200

12.80 x 6.3

80.640

300

4.5 x (-3)

-13.5

400

-15.6 x (-2)

31.2

500

-7/10 x 1/4

-7/40

Subtracting Rational #'s

100

Solve the problem

15 - (-8)

23

200

Mickey borrowed $75.00 from his grandparents to purchase a season pass to a theme park. After saving up his allowance for one month, he is able to pay them $24.65. How much does Mickey still owe his grandparents?

Mickey owes his grandparents $50.35 because he borrwed $75.00 and he paid $24.65.

300

-9/10 - (-3/10)  Simplify your answer

-3/5

400

-20 - 9

-29

500

10.8 - (-6.4)

17.2

Adding Rational #'s

100

-16 + (-8)

-24

200

6.25 + (-8.50)

-2.25

300

-54.26 + (-15.42)

-69.68

400

-1 1/2 + 2 7/10

1 1/5 or 6/5

500

-6/11 + 3

27/11 or 2  5/11

Vocabulary

100

What goes in the blank?

What do you call it when you "flip" a fraction upside down: ________________.

Reciprocal

200

What goes in the blank?

What is the top of a fraction called: ________________.

Numerator 

300

What goes in the blank?

 __________ is any number that can be represented as a fraction.

Rational

400

What goes in the blank?

To write a fraction as a decimal you must ___________ the numerator by the denominator.

Divide

500

What goes in the blank?

 ______________ is the term for two numbers that are opposites, when added together they equal zero.

Additive inverse