Positive and Negative Numbers

Adding/Subtracting

100

3+ (-5) = ?

-2

200

-7 - (-3)

-4

300

^{5/6 - 8/6} 

- 3/6

400

-2.5 + 4.75

2.25

500

-7/12 + 5/6

3/12 = 1/4

Multiplying

100

4(-3)

-12

200

(-2)(-5)

10

300

(-3/4)(8/5)

(-24/20) = (-6/5)

400

(-0.5)(0.4)

-.20

500

(-2)(-2)(-2)(-2)

16

Dividing

100

(-12) divided by 4

-3

200

8 divided by (-2)

-4

300

(-5/8) divided by (2/3)

-15/16

400

(-8)(1/2) divided by (-2)

2

500

(-100)(1/5) divided by (-2.5)(2)

4

Real-World Problems

100

A submarine is at a depth of -50m. If it rises 20m, where is it now?

-30m

200

A hiker starts at an elevation of 200 ft and descends 450 ft. What is her final elevation?

-250 ft

300

You spend $5.75 on lunch and $3.25 on a drink. Your friend gives you $10.00. How much money do you have left?

$1.00

400

The temperature was -8 degrees C in the morning. By noon, it increased by 5.5 degrees C. What is the new temperature?

-2.5 degrees C

500

A diver descends 2.5 meters per second. What is the diver's elevation after 6 seconds?

-15

Number Lines

100

Which is greater, -3 or -5?

-3

200

Plot -3/4 on a number line. Which two whole numbers is it between?

-1 and 0

300

Place these numbers in order from least to greatest:

1.2, -0.5, 3/4, -1.5

-1.5, -0.5, 3/4, 1.2

400

If x = -2.5, what is the absolute value of x?

2.5

500

Which is farthest from zero:

1, -.25, -7/2, or 5/2

-7/2