Integer Add/Subtract
13 + 57
= 70
5(8)
= 40
|21|
=21
8p=72
P = 9
Plot the following points on a number line:
1, -4, -7, 5
(Show White Board)
-9 - (-19)
= 10
72 / (-8)
= -9
|-3|
3
−5s= −100
S = 20
(−11)(−11)
= 121
-12 + (-8)
= -20
−34
= -81
-|2| + 4
= 2
7x−3 when x=−9
= -66
Translate and solve
The product of −21 and n is 63.
-21 (n) = 63
n = -3
−19+(−42)+12
= -49
(8−15)(9−3)
= -42
- |-53| + 3
= -50
5a+8b when a=−2,b=−6
= -58
Temperature One morning the temperature in Bangor, Maine was 18 degrees. By afternoon, it had dropped 20 degrees. What was the afternoon temperature?
= -2 degrees
10+4(−3+7)
= 26
(−3)(4)(−5)(−6)
= -360
|14−8|−|−2|
= 4
x2+5x+4 whenx=−3
= -2
ANSWER BOTH:
Temperature On Monday, the high temperature in Denver was −4 degrees. Tuesday’s high temperature was 20 degrees more. What was the high temperature on Tuesday?
Credit Frida owed $75 on her credit card. Then she charged $21 more. What was her new balance?
Answer 1: 16 degrees
Answer 2: Balance = 96 dollars owed