Adding and Subtracting

Integers

100

-5 + -11

-16

200

-12 +  16

4

300

17 - 22

-5

400

Write the addition equivalent (equal) number sentence then solve:

27 - (-40)

addition number sentence:  27 + 40

Answer: 67

500

Write the addition equivalent (equal) number sentence then solve: 

-54 - (-42)

Addition Number Sentence:  - 54 + 42

Answer:-12

Find the missing number

100

9 + ____ = 0

-9

200

5 + ___ = -3

-8

300

-12 + ____ = -2

10

400

-2 + ____ =  -14

-12

500

-4 - ____ =  10

-14

Decimals

100

3.4 + -1.2

2.2

200

-17.4 +  -9.3

-26.7

300

5.27 - 6.8

-1.53

400

Write equivalent (equal) addition number sentence then solve:

-54.24 - 20.1

Addition Number Sentence:  -54.24 + - 20.1

Answer: -74.34

500

Write the addition equivalent sentence then solve:  

-34.67 - (-22.99)

Addition Number Sentence:  -34.67 + 22.99

Answer: -11.68

Fractions

100

-1/4 + 2/4

1/4

200

-4/5 + -1/10

-9/10

300

-1/3 + 5/6 

You must simplify!!

-1/2

400

-2/4 - (-7/8)

3/8

500

-1/6 - 2/12

You must simplify!!!

-1/3

Mixed Review

100

Rewrite as an addition problem:

7 - 15

7 + -15

200

Rewrite as and addition problem:

-34 - (-99)

-34 + 99

300

What three "words" helps us remember how to change any subtraction problem to an addition problem?

Keep , Change, Change

or  

Add The Opposite

400

The submarine starts at 0 (sea level),  there are 4 floats added and 7 anchors added.  What is the ending position of the submarine?

-3

500

The submarine starts at -4 ft.  If 4 floats are removed, and 10 anchors are added.  What is the ending position of submarine?

-18 feet