Rational Numbers Review

Vocabulary

100

Equivalent

When two values are equal

200

Inverse

Opposites

300

Integer

A whole number that is negative or positive, and including zero

400

Rational Number

A number that can be written as a fraction

500

Absolute Value

The distance from zero on a number line

Long Division

100

2/5

0.4

200

11/20

0.55

300

4/9

0.44444..... repeating

400

25/4

6.25

500

1/8

0.125

Adding Integers

100

5+2

Same signs add and keep

5 + 2

7

200

-10 + -6

Same signs add and keep

-10 + -6 

= -16

300

-19 + 5

Different signs subtract

- 19 + 5

= -14

400

4 + -7

Different signs subtract

4 + -7

= -3

500

-17 + - 9

Same signs add and keep

-17 + -9

= -26

Subtracting Integers

100

6-4

2

200

5 - 8

5 - 8

5 + -8

= -3

300

-9 - 14

-9 - 14

-9 + (-14)

= -23

400

9 - (-3)

9 - (-3)

9 + (+3)

=12

500

-12 - (-5)

-12 - (-5)

-12 + (+5)

= -7

Multiply/Divide

100

5 * 15

75

200

-17 * 5

-85

300

9 * -14

-126

400

23/4

5.75

500

-55 / -4

13.75