Rational Numbers Review

Addition

100

12 + (-3)

9

200

(-8) + (-7)

-15

300

-1/4 + -3/4

-1

400

1/5 + (-1/2)

-3/10

500

(-5/2) + (2/3)

(-1 1/2) OR (-9/6)

Subtraction

100

5 - 7

Rewrite as addition, then solve.

-2

200

-14 - (+6)

Rewrite as addition, then solve.

-20

300

-13 - (-9)

-4

400

(1/2) - (-3/4)

Rewrite as addition, then solve.

1 and 1/4

500

-6 - 5 - (-13.5)

Rewrite as addition, then solve.

2.5

Multiplaction

100

-6 x -4

24

200

1/2  x (-2/3)

Simplify your answer.

-1/3

300

(1  1/3) x (-2 1/2)

Simplify after solving.

-3 and 1/3

OR

-10/3

400

1.25 x -5

-6.25

500

-10 x 3 x (-4/5)

Simplify.

24

Division

100

10 divided by -5

-2

200

-64/-8

8

300

Which quotient is positive?

A) 2 divided by (-3/5)

B) 0 divided by (3/4)

C) (-1/5) divided by (-0.75)

D) 24 divided by -5

C) (-1/5) divided by (-0.75)

400

(1/2) divided by (-2/5)

(-10/4) = (-5/2) = (-2 1/2)

500

- (-72/-9) x -1

8

Grab Bag!

100

Write an equation that matches the description and solve:

Mr. Maher found $10 on the ground.  Then Mr. Maher spent $10 at CVS.

10 + -10 = 0

200

Write an equation that matches the description and solve:

The temperature in the morning was -4C.  By noon it rose 10 degrees.

-4 + 10 = 6

300

Write 2/3 in decimal form

.6666 repeating

400

Write an equation that matches the description and solve:

Mr. Maher correctly answered 3 questions for 500 points each.  Then incorrectly answered the next 4 100 point questions.

3(500) + 4(-100) = 1100

500

Write an equation that matches the description and solve:

The temperature changed -54 degrees over 9 hours.  What was the temperature change per hour?

-54 divided by 9 = -6 degrees per hour