7th Grade Rational Number

Addition

100

(-9) + 4 =

-5

200

10 + (-23) + 12

-1

300

2.3 + (-4.9)

-2.6

400

-16.89 + 25.37 =

8.84

500

-1 2/3 + 2/3

-1

Subtraction

100

-7 - 5 =

-12

200

5 - (-5) =

10

300

-8.1 - (-3.5) =

-4.6

400

- 1/5 - (- 2/3)

7/15

500

-4 1/4 - (-4)

-1/4

Multiplication and Division

100

-2 * 5

-10

200

-12.6 ÷ 0.3

(-42)

300

-2.4 * - 8.2

-19.68

400

- 3/5 ÷ - 1/3

9/5 or 1 4/5

500

-4 5/6 ÷ (-6 2/3)

29/40

Order of Operations

100

(-7) + 2(4 - 8)

-15

200

-240 - 160 + 390

-10

300

5 + 24 ÷ (-6) - (-7)

8

400

[- 1/5 - (- 2/3)] * (- 5/6)

- 7/18

500

When a=2, b=-6, and c=-4

b/a + c

-7

Vocabulary

100

Two numbers that are opposites are called...

Additive Inverse

200

Any whole number with no decimals or fractions is...

An Integer

300

A decimal that goes on and on forever...

A repeating decimal, or a non-terminating decimal

400

This is placed above a repeating decimal to show it goes on and on forever.

a bar, or bar notation.

500

Any number, positive or negative, that can also be a fraction or decimal is...

a rational number.