Unit 1 Test Review

Rules of Addition

100

Positive + Positive =

Positive 

200

Positive + Negative =

Depends on the greater absolute value

300

When adding two rational numbers with DIFFERENT signs, we _________ the two numbers.

subtract

400

When two rational numbers are equal distance from 0 but on different sides of 0, they are called _________.

opposites

500

What is the name of the property that states any rational number plus its opposite will equal 0?

Additive Inverse Property

KCC

100

What does KCC stand for?

Keep Change Change

200

When should you use KCC?

On a subtraction problem

300

The purpose of KCC is to rewrite a subtraction problem so that we ______ the __________.

add, opposite

400

Evaluate.

2 - (-5)

7

500

Evaluate.

-6 - 12

-18

Fractions & Decimals

100

True or False.

We do not use KCC when adding and subtracting fractions and decimals.

False

200

When adding and subtracting decimals, the rules are the same except we also _________________ before adding and subtracting.

line up the decimals

300

Before we add and subtract the ____________ in the fractions, we first need to get __________ ___________.

numerators, common denominators

400

Evaluate.

3/4 + 3/8

9/8 or 1 1/8

500

Evaluate.

7/3 - 2/9

19/9 or 2 1/9

Solve

100

-1 + 4

3

200

Order from least to greatest:

2, 0, l-3l, -8, l5l, -1

-8, -1, 0, 2, l-3l, l5l

300

-7 + -2

-9

400

3 - 11

-8

500

-5 + (8) - 6

-3

Word Problems

100

A scuba diver starts his dive at 3 feet below the surface. He dove another 6 feet down into the water. What is the elevation of the diver now?

-3 - 6

-3 + -6

-9 feet

200

In Buffalo, New York, the temperature was 3^oF in the morning. If the temperature drops 7^oF, what is the new temperature?

3 - 7

3 + -7

7-3 

-4^oF

300

Emily borrowed $3.94 from her brother. She got $15.50 for her birthday. After she pays back her brother, how much money will she have left over?

15.50 - 3.94

15.50 + -3.94

$11.56

400

Chen ate 5/8 of a pizza. His cousin ate 1/2 of another pizza. How much pizza did they eat together?

5/8 + 1/2

5/8 + 4/8

9/8 or 1 1/8 pizzas

500

Steve has overdrawn his checking account by $27. His bank charged him $15 for an overdraft fee. Then he quickly deposited $100. What is his current balance?

-27 - 15 + 100

-27 + -15

-42 + 100

$58