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 in terms of numbers?
The opposite of -5 would be what?
A negative number and its positive
5
What is the rule for adding integers with the same sign?
Add across and keep the sign
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?
To remove any negative sign in front of a number
To think of all numbers as positive
What are the rules for subtracting integers?
Add the opposite then follow addition rules
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...
Subtract the absolute value and keep the sign of the higher number
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 but doesn't include zero
If both integers are negative the answer will be.....
The sum will be negative
-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