Sum (+) of Integers
Find the sum
(+4)+(+20)
24
3 - (-9) =
6
What are opposite numbers?
A negative number and its positive
EX: 3 and -3 EX: 8 and -8
1) Climbing a mountain is like a ___________integer.
2) Diving under water is like a ____________integer.
*number your answers!
2) Negative
-12 + 5 =
=-7
-19 - ( 15) =
-34
What is a zero pair?
Two numbers that add up to a zero.
Benny has $75 to spend. He purchased a gift for $93. If he borrows the extra money that he needs, how much does he need to borrow?
$18
-16 + (-17) =
-33
71 - (-14) =
85
When you find a sum you are ________.
When you find the difference you are _____________.
Adding
Subtracting
You take 6 steps forward and 8 steps backwards. How many steps have you taken? Be specific.
2 steps backward or -2.
-5 + (5) - 19 =
-19
-14 - (14) =
-28
What is an Integer? What is it NOT?
A WHOLE number that can be negative or positive
NOT a DECIMAL or FRACTION
The temperature on Monday is 20 degrees celsius. If the temperature increases by 10 degrees on Tuesday and falls by 15 degrees on Wednesday, what is the final temperature recorded on Wednesday?
15 degrees celsius
-8+(-4)+12
0
-32 - (-14) =
-18
Is zero positive or negative?
Neither!
The top of a mountain is 1270 feet above sea level. The bottom of a valley is 650 feet below sea level. How high is the mountain top from the bottom of the valley?
1920 feet