Find the Sum
What is an Integer?
A whole number that can be negative or positive
3 - 4 =
-1
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
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 both plays?
They lost 13 yards
-13
What is the absolute value of a number?
the distance of a number from zero on a number line
17 + 5.5
22.5
-12 + 15 =
3
What are the rules adding integers with the same sign?
a) Add the integers and keep the sign
b) Subtract the absolute value and keep the bigger number
c) Subtract and keep the sign
a
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
+9
What is the absolute value of |-48|?
48
-16 + (-17) =
-33
4+(-2) =
2
When adding integers with different signs you...
a) Subtract the absolute value and keep the sign of the smaller number
b) Subtract the absolute value and keep the sign of the higher number
c) Subtract the absolute value then add
b
Sarah has $152 in the bank. She withdraws $64 for the state fair and puts back $20. What is her remaining balance?
$108 remaining.
What is the absolute value of -|12|
-12
7 - (-8) =
15
-29 + 38 =
9
Subtracting a negative integer is like...
a) adding a positive integer
b) adding a negative integer
c) subtracting a positive one
a
You owe $9 to one friend, and you borrowed $17 from another friend. After you babysit your neighbor and earn $22. Did you earn enough money to pay back your debt?
No, you still owe $4.
-4
-5 ____-10
> Greater than
-8+(-4)+12 =
0
-5 + (5) - 19 =
-19
When adding multiple integers, what is a smart way to solve...
a) find the opposites
b) add similar signs first
c) look for positive signs
b
After takeoff, an airplane climbs 2,500 feet. Some turbulence brings down the plane 90 feet. After 20 minutes, the airplane ascends 155 feet. What is the airplane's current altitude?
2565 ft.
Put in order from least to greatest
|-2|, 10, -4, 3
-4, |-2|, 3, 10