Adding Integers
Find the sum
-6 + 18
12
3 - (-9) =
12
+3 and -3 are called....
opposites
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 is the rule for adding integers with the same sign?
a) The answer is always positive
b) Add the opposite
c) Add and keep the sign
c
++++++++++
- - - -
What equation does this represent?
+10 + (-4) = 6
-14 + -8 =
=-22
-19 - ( 15) =
-34
? - (-6) = +10
4
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
Re-write this subtraction problem (-3) - (-9) as an addition problem
(-3) + 9
Fill in the blank with < , > or =
-8 _ -6
-8 < -6
-40 + 25 =
-15
? - 6 = -12
-6
When you find a sum you are ________.
When you find the difference you are _____________.
Adding
Subtracting
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
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
8 - ? = 12
-4
-5 + 4 - 7
-8
-14 - (14) =
-28
What is an Integer?
A whole number that can be negative or positive
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)
Subtracting a negative integer is like...
a) adding a positive integer
b) adding a negative integer
c)subtracting a positive one
a
X + (-5) = 20
+25
-8+(-12) - 5 -2
-27
-32 - (-14) =
-18
Arrange the number from smallest to largest:
-3, -4, -1, -23
-23, -4, -3, -1
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.
-22 + 24 -6=?
-4
Put in order from least to greatest
-2, 10, -4, 3
-4, -2, 3, 10