Adding & Subtracting Rational Numbers

Absolute Value

100

l 4 l

4

200

l -16 l

16

300

l 21 -14 l

7

400

l 2 - 6 l

4

500

l -1 - 2 l

3

Integer Rules

100

-8 - 4

-12

200

7 - (-2 )

9

300

-26 - (-11)

-15

400

14 + (-3)

11

500

-5 - (-10)

5

Rational Numbers

100

-13.4 + 8.6

-4.8

200

7.51 + 22.08

29.59

300

1/2 + (-3/4)

-1/4

400

4/7-2/5

6/35

500

- 328.17 + 63.40

-264.77

Converting

100

3/5 as a decimal

0.60

200

1/3 as a decimal

0.3R

300

5/8 as a decimal

0.625

400

7/10

0.70

500

1/6

0.16R

the 6 repeats

Context

100

A bird's nest is 54 feet high in a tree. What is it's distance from the ground?

54 feet

200

Mary says 9 - (-8) is -1. Jack says its 17. Who is correct? Explain.

Jack because you have to keep 9 change - to + and change -8 to 8. Then 9+8=17

300

What do we need to do to subtract numbers in math?

Keep, Change, Change

400

Patrick is depositing $54 into his bank account. He deposits $8.50 more on Monday, and withdraws $21.75 on Tuesday. How much money does Patrick have in his account?

$41.25

500

The temperature on Sunday was 62 degrees. It dropped 8 degrees overnight. What was the temperature after the drop?

54 degrees