Sum (+) of Integers
-4 + 16 =
12
-59 + _ = -60
-11
A football team loses 5 yards on one play and then loses 8 yards on the next play. How many yards did they lose on the two plays?
They lost 13 yards
-13
3 - (-9) =
What are opposites?
A negative number and its positive
Adding two negative numbers will always result in a _______ answer.
Negative
-12 + 5 =
=-7
___ + (-9 ) = -24
Daily Double
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 absolute value?
The number away from zero
When adding a negative and a positive, find the difference and take the sign of the _____ number.
larger
-16 + 17 =
-19 - ___ = 4
Stephanie has $15 in the bank. She deposits 4 dollars into her account. Use an equation to represent this situation and find the sum.
15 + 4 = 19
71 - (-14) =
85
When you find a sum you are ________.
When you find the difference you are _____________.
Adding
Subtracting
When subtracting a negative number, you should think of it as ....
...adding a positive.
(a double negative = a positive)
-5 + (-13) =
-18
-10 + _ = -7
You are 5 dollars in debt. You borrow 12 dollars more. What is the total amount of your debt?
You owe 17 dollars
(-17)
-16 - (-9) =
-7
Adding a negative is the same as...
A) subtracting a positive
B) adding a positive
C) subtracting a negative
A
Can you rewrite -14-10 as an addition problem?
-14 + (-10)
-8+(-4) =
-12
18 + ___ = -1
-19
Daily Double
Subtracting Integers: One morning in Cullowhee, the temperature was 19 degrees Fahrenheit. The temperature over night reached -5 degrees Fahrenheit. What is the total change between the morning temperature and the night temperature?
- 24 degrees
-18 - (-14) =
-4
Daily Triple
subtracting a negative is the same as...
A) adding a positive
B) subtracting a positive
C) Adding a negative
A
Suppose y is a positive integer. If x - (-y) = z, will z be greater than or less than x?
Greater than; Subtracting -y is the same as adding its additive inverse, y.