Adding & Subtracting Integers
-12 +( -5) =
=-17
Write an expressions for:
The temperature fell 35 degrees from 10 overnight. By 9:00 am went up up 25 degrees and by 12:00 it was up another 10 degrees. What was the temperature at 12:00?
10 -35 +25 +10
You park in a garage 3 floors below ground level. Then you get in the elevator and go up 12 floors. What floor do you get off the elevator?
9th floor
-19 - (+ 15) =
-34
What is an integer?
A positive or negative whole number.
Or
the set {...,-2,-1,0,1,2,...}
14-(-4) =
18
Write as a expression:
In a certain game, each player starts with 100 points. During the first round of the game your team drops 16 points, gains 10 points and then loses 20.
100 - 16 +10 - 20
Stephanie has $15 in the bank. She deposits 4 dollars into her account. Use an expression to represent this situation and then evaluate.
15 + 4 = $19
71 - (-140) =
211
True or false.
The set of integers includes decimal numbers.
False
5 + (-25)
-20
Write an expression for:
A whale calf is 50 m below sea level. It rises 26 m to reach its mother after which it gets so excited that it decides to breech the surface of the water. From its mom, it rises a wopping 31 m. How many metres does it get above sea level?
-50 +26 +31
You are 5 dollars in debt. You borrow 12 dollars more. What is the total amount of your debt?
You owe 17 dollars
(-17)
-14 - (-24) =
+10
Adding a negative is the same as...
A) subtracting a positive
B) adding a positive
C) subtracting a negative
A
-16 + (-7) =
-23
Write an expression:
You start with $50 in your checking account. You receive $20 from your grandmother for your birthday and deposit it. You spend $35 on a new video game and another $10 on lunch.
$50+$20-$35-$10
One morning in Cullowhee, the temperature was 19 degrees Fahrenheit. The temperature over night reached -5 degrees Fahrenheit. What is the difference between the morning temperature and the night temperature?
24 degrees
24/-6+7=
subtracting a negative is the same as...
A) adding a positive
B) subtracting a positive
C) Adding a negative
A
-54 - (-37) + (-20)
-37
Write an expression:
Ms Mizz is watching Jeopardy on tv. Each contestant starts with $0. Contestant 1 starts off strong getting three $100 dollar questions in a row correct. They then lose a $500 question and two $200 questions.
$0+3x$100-$500-2x$200
Below are temperatures in the morning and during the day in different locations.
Arizona:
Morning: 5oC Afternoon: 17oC
Alaska :
Morning: -40oC Afternoon: -12oC
Sahara Desert:
Morning: 18oC Afternoon: 30oC
Ontario
-7+2(12-:3)
1
When you multiple a negative number to a positive number the answe will be ..... (positive or negative)?
negative