Sum (+) of Integers
Find the sum
(+4)+(+20)
24
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?
They lost 13 yards
-13
What are opposite integers? (Give an example)
A negative number and its positive
What is the rule for adding integers with the same sign?
a) The answer is always positive
b) Add the opposite
c) Add across and keep the sign
c
With two negatives, you __________ and ___________ the sign.
add; keep
-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?
9th floor
What is a zero pair?
write a zero pair
Congratulations!
Will the answer be positive or negative?
-26 + 25
negative
-16 + (-17) =
-33
Adding Integers: Stephanie has $152 in the bank. She withdraws $20 then deposits $84 How much money is in her bank account?
216
When you find a sum you are ________.
When you find the difference you are _____________.
Adding
Subtracting
True or false:
When subtracting, you can flip the integers around to make the subtraction easier.
FALSE
With opposite signs, you __________________ and keep the sign of the ___________________ number.
subtract; larger (absolute value)
-5 + (5) - 19 =
-19
You are 5 dollars in debt. You borrow 12 dollars more. What is the total amount of your debt?
You owe 17 dollars
(-17)
What is the name for a whole number that can be negative or positive?
Integer
True or False:
Negative integers added to negative integers equal more negative integers.
True
Will the answer be positive or negative?
100 + (-37)
positive
-8+(-4)+12
0
An airplane takes off and climbs to 2500 feet. After 20 minutes, the airplane descends 200 feet. What is the airplane's current altitude?
2300 ft.
What do you get when you add or subtract two opposite integers together?
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
Will the answer be positive or negative?
30 + (-15) + (-30)
negative