Adding/Subtracting Integers
When adding a positive number and a negative number, how do you know if your answer is positive or negative?
The bigger number takes the sign
When multiplying a negative and a positive number, will your answer be positive or negative?
Negative
2 + x =8
x=6
The airport with the highest elevation in the United States is 9927 feet above sea level. The lowest elevation is 210 feet below sea level. What is the difference between the elevation of these airports?
9717
If you have two negative numbers, do you add or subtract them?
Add
When dividing two negatives, will your answer be positive or negative?
Positive
-4-7
-11
0+x=3
x=3
A submarine is at a depth of 245 meters below sea level. It descends 32 meters. what is the new Depth, in meters, of the submarine?
-275
If you have a positive number and a negative number, do you add or subtract them?
Subtract
-50 x -10
500
x-13=2
x=15
Jean worked 3 hours more than Robert, but 1 hour less than Chuck. Chuck worked for 5 hours. How long did Robert work?
1 hour
140 + (-32)
108
6x=24
x=4
The level of the water in a river rose 2.2 feet on Monday, rose 7.6 feet on Tuesday, fell 2 feet on Wednesday and fell 7.6 feet on Thursday. What was the total change in feet of the water level in the river between Monday and Thursday?
0.2
5-(-2)
7
5 x -2 + (-6/-2)
-7
x/3=6
x=18
3 2/5 + 4 4/5 Simplify your answer
8 1/5