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
3 - (-9) =
12
What are opposites?
A positive number and its corresponding negative number
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
d) all of the aove
c
What is the absolute value of |-48|?
48
-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
-19 - ( 15) =
-34
What is absolute value?
The distance of a number from Zero on the number line
What are the rules for subtracting integers?
a) Turn the problem into an addition problem, then follow addition rules
b) Subtract the absolute value and keep the sign of the bigger number
c) Subtract and keep the sign
A
What is the absolute value of |92|?
92
-16 + (-17) =
-33
Adding Integers: Stephanie has $152 in the bank. she withdraws $20 then deposits $84 in an addition expression to represent this situation find the sum.
216
71 - (-14) =
85
When you find a sum you are ________.
When you find the difference you are _____________.
Adding
Subtracting
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
What is the absolute value of -|12|
Distance cannot be negative
-5 + (5) - 19 =
-19
Subtracting Integers: You are 5 dollars in debt. You borrow 12 dollars more. What is the total amount of your debt?
You owe 17 dollars
(-17)
-14 - (14) =
-28
What is an Integer?
All positive numbers and their opposites
Subtracting a negative integer is like...
a) adding a positive integer
b) adding a negative integer
c)subtracting a positive one
d) all of the above
A
-5 ____-10
> Greater than
-8+(-4)+12
0
Subtracting Integers: An airplane takes off and then climbs 2500 feet. After 20 minutes, the airplane descends 150 feet. What is the airplane's current height?
2350 ft.
-32 - (-14) =
-18
What is an additive inverse?
The same numbers that when added together equal 0 because they are opposites.
When adding multiple integers, what is a smart way to solve?
a) find additive inverses (numbers that cancel out)
b) add similar signs first
c) look at the signs
D) all of the above
ALL OF THE ABOVE
Put in order from least to greatest
|-2|, 10, -4, 3
-4, |-2|, 3, 10