Sum (+) of Integers
Find the sum
4 + (-20)
-16
Adding Integers: 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?
-13 = They lost 13 yards. -5 + (-8) = -13
Numbers that are the same distance from zero but on the different sides of zero on the number line
Opposites
What is the rule for adding integers with the same sign?
a) The answer is always positive
b) Add the opposite
c) Add and keep the sign
c) Add and keep the sign
20 + (-15)
5
-12 + 5 =
=-7
Adding Integers: 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?
The 9th floor. -3 + 12 = 9
What is the absolute value of -|-48| ?
-48
What is the rule for adding integers with different signs?
a) Subtract and keep the sign of the first number
b) Subtract and keep the sign of the "larger" number
c) Add and keep the same sign
b) Subtract and keep the sign of the "larger" number.
-10 + -8
-18
-6 + (-17) =
-23
An airplane takes off and climbs to 25 feet. After 20 minutes, the airplane descends 20 feet. What is the airplane's current altitude?
Altitude is 5 ft. 25 + (-20) = 5
When you find a sum you are ________.
When you find the difference you are _____________.
Adding
Subtracting
For which of the following can you NOT change the order in which you perform the operation?
a)addition
b)subtraction
c)multiplication
d)all of the above
b)subtraction
14 + (-3) + 4=
15
-5 + (-19) + 5
-19
You are 5 dollars in debt. You borrow 12 dollars more. What is the total amount of your debt?
-17 = You owe 17 dollars. -5 + (-12) = -17
What is the name for a negative or positive whole number?
Integer
A negative integer added to a negative integer equals what?
a) positive integer
b) negative integer
b) negative integer
-13 + 15 + (-32) =
-30
-8+ (-4)+12
0
Adding Integers: Stephanie has $152 in the bank. She withdraws $20 then deposits $84 How much money is in her bank account?
She has $216.00. 152 + (-20) + 84 = 216
What do you make when you combine two opposite integers?
A Zero Pair OR zero
When adding many different integers together, what is a smart way to solve...
a) find zero pairs
b) add similar signs first
c) both a and b
c) both a and b
22 + (-19) + (-12) =