Lessons 1.1-1.3

Adding Integers

100

-2+7

5

200

10+(-23)

-13

300

-31+(-8)

-39

400

-4+(-5)+9

0

500

You withdraw $152 from your bank account. Later, you deposit $45 from the account. What is the overall change in your account?

-$107 OR decreased by $107

Subtracting Integers

100

4-17

-13

200

-9-(-15)

6

300

15-(-19)

34

400

2-7-15

-20

500

The record low temperature in Brazil is −14°C. The record low temperature in Hawaii is −11°C. What the difference, in degrees, between the record low temperatures?

3 degrees

Absolute Value

100

∣−14∣

14

200

∣5−4∣

1

300

∣-8+(−4)∣

12

400

Can ∣x∣ ever be negative?

No

500

The record low temperature in Canada is -81°F. The record low in Costa Rica is 16°F. What is the difference, in degrees, between the record lows?

∣-81-16∣= 97 degrees

Expressions & Number Sentences

100

What expression shows "4 being subtracted from 3"

3-4

200

What number sentence represents "The sum of -13 and 2"

-13+2=-11

300

Evaluate this expression:

-7+5-(-8)

6

400

Complete this number sentence:

-2-3-5-(-4)=

2-3-5-(-4)=-6

500

A peak in Hawaii is 1277 meters. An underwater volcano is -969 meters. Which expression shows the distance between the two points:

A) -969-1277    B) 1277-(-969)   

C) 1277-969     D) -969+1277

B) 1277-(-969)