Adding and Subtracting Positive and Negative Numbers

Sign of the Answer

100

18 + (-9)

What is positive?

200

-300 + (-100)

What is negative?

300

25 1/4 + (-75 3/4)

What is negative?

400

1.5 - (-2.0)

What is positive?

500

-2.63 - (-7.41) + 3.55

postive

AddingEasier

100

-3 + (-12)

What is -15?

200

7 + (-4)

What is 3?

300

-21 + 17

What is -4?

400

-3.4 + (-3.4)

What is -6.8?

500

7 1/2 + -3 1/2

What is 4

Adding Harder

100

-54 + (-48.5)

What is -102.5?

200

120 1/3  + (-78)

What is 42 1/3?

300

-50.25 + 150

What is 99.75?

400

-4.25 + (-2.40)

What is -6.65?

500

-2/3 + 1 1/3

What is 2/3

Subtracting Easier

100

6 - (-5)

What is 11?

200

-10 - (-10)

What is 0?

300

-20 - 7

What is -27?

400

-3.5 - 1.0

What is -4.5?

500

-2.64 - (-5.72)

What is 3.08

Subtracting Harder

100

8.5 - 12.75

What is -4.25?

200

-2.1 - 1.9

What is -4.0?

300

19 1/4 - (-16 3/4 )

What is 36?

400

-50 - (-4.9)

What is -45.1?

500

-12.42 - (-1.33)

What is 11.09