Add/Subtract Integers

Vocab

100

What is absolute value?

The distance from zero (positive or negative)

200

What is an integer?

A positive and negative number 

300

Explain the rule for adding integers

If the signs are the same, you can add. If they are opposite, you subtract

400

Explain the rule for subtracting integers

You must first flip the subtraction equation to addition and change the 2nd integer to its opposite. 

Keep, Change, Flip

500

When subtracting integers, how do you know if your answer will be positive or negative?

keep the sign of the biggest (absolute value) number

Adding Integers

100

6+(-4)

2

200

-3+2

-1

300

-5+ (-6)

-11

400

-20 + 3

-17

500

-12 + (-4) + (-3)

-19

Absolute Value

100

|-9| + |10| =

19

200

|15| - |-4| =

11

300

|4| + |9| =

13

400

|-10| + |-6| =

16

500

-|15| + |-10| =

-5

Subtracting Integers

100

7 - 10

-3

200

-5 - 7

-12

300

6- (-4)

10

400

-7 - 10

-17

500

-4 - (-6) - 2

0

Fractions

100

1/6 + 4/6

5/6

200

4/12 + 3/12 = 

7/12

300

3/4 + 2/4 = 

5/4 or 1 1/4

400

1/2 + 4/10

9/10

500

4/5 + 1/2

13/10 or 13/10