Adding and Subtracting Integers

What's the Sign?

100

A positive plus a positive equals a _____________.

(+) + (+) = _______

A positive (+)

200

A negative plus a negative equals a ___________.

(-) + (-) = _____

A negative (-)

300

How do you know what the sign of your answer will be? (positive or negative)

It will be the sign of the bigger number in the original problem.

400

What does K-C-O stand for?

Keep (K), Change (C), Opposite (O)

500

Minus a negative turns into __________ _________.

- (-) = ___ ___  (ex: 2 - (-2) = ____)

Plus a positive + (+)

Adding Decimals

100

   1.2

+ 3.3

______

(1.2 + 3.3 =_____)

4.5

200

   -2.5

+  3.4

______

(-2.5 + 3.4 = _____).

0.9

300

  -12.5

+   6.2

_________

(-12.5 + 6.2 = _____)

-6.3

400

     8.9

+ -4.2

________

(8.9 + (-4.2) = _______)

4.7

500

   -8.3

+ -2.5

__________

(-8.3 + (-2.5) = ______ )

-10.8

Adding Fractions

100

2/3 + 1/3 =

3/3

200

-3/8 + (-1/8) =

-4/8

300

-2/7 + (-4/7) =

-6/7

400

-2/9 + (4/9) =

2/9

500

-4/5 + 2/5 =

-2/5

Subtracting Decimals

100

  4.6

- 2.1

______

(4.6 - 2.1 = _______)

2.5

200

  - 3.5

 -  5.1

_________

(-3.5 - 5.1 = _____)

-8.6

300

 - 12.4

-    5.8

________

(-12.4 - 5.8 = _____)

-18.2

400

   10.1

- (-5.5)

________

(10.1 - (-5.5) = _____)

15.6

500

    12.6

- (- 9.8)

_______

(12.6 - (-9.8) = _____ )

22.4

Subtracting Fractions

100

3/4 - 2/4 = ______

2/4

200

- 3/9 - 1/9 = ______

-4/9

300

3/6 - (-1/6) = ______

4/6

400

-9/12 - 4/12 = _____

-13/12

500

7/10 - (-3/10) = _______

10/10