CCA 1.3

Integers

100

5 + -2

3

200

-4 + (-3)

-7

300

12 + (-18)

-6

400

15 + -16

-1

500

-4 + (-24) + 6

-22

Fractions

100

5/16  +  (-7/16)

5/16  +  (-7/16)
-2/16

-1/8

200

3/5  +  (-4/15)

3/5  +  (-4/15)
9/15 + (-4/15)
5/15

1/3

300

2/3  +  (-1/6) 

2/3  +  (-1/6)
4/6  + (-1/6)
3/6

1/2

400

1/7  +  (-3/4)

1/7  +  (-3/4)
4/28 + (-21/28)

-17/28

500

-3/4  +  (-3/8)

-3/4  +  (-3/8)
-6/8  +  (-3/8)

-9/8  or -1 1/8

Mixed Numbers

100

-7/2  +  3 2/3

-7/2  +  3 2/3
-7/2  +  11/3
-21/6 + 22/6

1/6

200

5 1/3 + -5/9

4 7/9

300

3/12 + (-1) + 7/12

-1/6

400

-4 1/5 + 3 2/3 + -1 2/5

-1 14/15

500

5 + (-2 1/3) + (-3 1/6)

5 + (-2 1/3) + (-3 1/6)
5/1 + -7/3 + -19/6
30/6 + -14/6 + -19/6
16/6 + -19/6
-3/6
-1/2

Decimals

100

5.6 + (-1.3) 

4.3

200

-8.2 + 5.4

-2.8

300

7.15 + (-12.76)

-5.61

400

[4.9 + (-3.5)] + (-0.5)

[4.9 + (-3.5)] + (-0.5)
1.4 + (-0.5)

0.9

500

-12.4 + 19.1 + (-4.3)

2.4

Use It

100

The temperature is -12.6 degrees Celsius. The temperature goes up 7.9 degrees. What is the new temperature?

-4.7 degrees Celsius

200

You finish 3/8 of the project. Your friend finishes 1/4 of the project. What fraction of the project is finished?

3/8 + 1/4
3/8 + 2/8
5/8 of the project is finished 

300

You are digging for dinosaur bones. You dig 4.5 meters underground, but realize that you need to dig a total of 6.42 meters underground.  What is the distance between your original hole and how far down the dinosaur bones are?

1.92 meters

400

Is this always, sometimes, or never true?

When adding two negative rational numbers, the sum will be negative

Always

500

Is this always, sometimes, or never true?

When adding two rational numbers with different signs, the sum will be negative. 

Sometimes