Rational Number Review

Adding Rational Numbers

100

-8+(-17)

-25

200

-4.8+9.3

4.5

300

5/12+(-11/12)

-1/2

400

-3/4+2/5

-7/20

500

-15+8.4+(-6)+3.6

-9

Subtracting Rational Numbers

100

6-(-15)

21

200

-7.2-(-3.8)

-3.4

300

2/6-7/6

-4/7

400

3 1/4-5 1/2

-9/4

500

8.5-12.3-(-4.1)

0.3

Multiplying Rational Numbers

100

12times(-8)

-96

200

-0.4times0.25

-0.1

300

-3/8times(-5/8)

15/64

400

2 1/2times(-1 1/3)

-10/3

500

-2 times(-3)times(-4)times(-5)

120

Dividing Rational Numbers

100

-72 divide 9

-8

200

-6.3divide-0.9

7

300

-7/10divide3/10

-7/3

400

-4/5divide(-1 1/4)

16/25

500

(-3/4)/(9/10)

-5/6

Vocabulary

100

Any number that can be written as a fraction a/b where a and b are integers and b cannot equal 0.

Rational Number

200

A decimal that ends after a set of number of digits, such as 0.375

Terminating Decimal

300

The distance a number is from zero on a number line, which is always non-negative.

Absolute Value

400

The mathematical rule stating that a number plus its opposites equals zero (a + (-a) = 0)

Additive Inverse Property

500

What is the sign rules for multiplying/dividing rational numbers?

Same signs is positive answer. Different signs is negative answer.