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 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
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 away from zero
What are the rules for subtracting integers?
a) Keep the first integer, change to addition, change the sign of the second integer, then follow addition rules
b) Subtract the absolute value and keep 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) a)Subtract the absolute value and keep the sign of the smaller number
b) Subtract the absolute value and keep the sign of the greater number
c)Subtract the absolute value then add
b
What is the absolute value of -|12|
-12
-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?
A whole number that can be negative or positive
Subtracting a negative integer is like...
a) adding a positive integer
b) adding a negative integer
c)subtracting a positive one
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
b) add similar signs first
c)look at the signs
ALL OF THE ABOVE
Put in order from least to greatest
|-2|, 10, -4, 3
-4, |-2|, 3, 10