Add and Subtract Rational Numbers REVIEW

Integers

100

Use a model (algebra tiles or number line) to solve.

-3 + 4

-1 

With a model!!

200

Use a model (algebra tiles or a number line) to solve.

-5 - 4

-9 

With a model!!

300

-15 - 81

-96

400

-71 + (-93)

-164

500

-48 - (-64)

16

Rational Numbers

100

12 + (-50)

-38

200

-3.42 - 9.76

-13.18

300

2/5 - (-1/2)

9/10

400

-7.298 + 21.25

13.952

500

-3  1/4 - 2/3

-47/12

=

-3  11/12

Real-World

100

A submarine was 86.5 feet below sea level. The submarine then sunk an additional 92.46 feet. How far below sea level is the submarine now?

WRITE AN EXPRESSION THAT CAN BE USED TO ANSWER THIS QUESTION

-86.5 - 92.46

OR

-86.5 + (-92.46)

200

A submarine was 86.5 feet below sea level. The submarine then sunk an additional 92.46 feet. How far below sea level is the submarine now?

USE A NUMBER LINE TO MODEL THE PROBLEM

Jump -92.46

<-----------|---------------------|--------------->

                 ?                       -86.5

300

A submarine was 86.5 feet below sea level. The submarine then sunk an additional 92.46 feet. How far below sea level is the submarine now?

EVALUATE THE EXPRESSION

-178.96 feet

OR

178.96 feet below sea level