Adding
-6 + 18
12
3 - (-9) =
12
A scuba diver is swimming at 25 feet below sea level. A seagull is flying 10 feet above sea level. What is the distance between them?
35 feet
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) add and keep the sign the same.
10 - ___ = -8
+18
-14 + -8 =
=-22
-19 - ( 15) =
-34
You park in a garage 3 floors below ground level. Then you get in the elevator and go up 12 floors. What is the difference between where you started and where you got off?
-15 floors
The rule for subtracting integers is ...
Subtracting a negative integer is like...
a) keep, change, keep
b) keep, change, change
c) subtract a positive
b) keep, change, change
Fill in the blank with < , > or =
-8 __ -6
-8 < -6
-40 + (25) =
-15
-4 + (-6) =
-10
Maya’s bank account is overdrawn; her balance is -20 dollars. Her friend, Leo, has $50 in his account. What is the difference in their balances if you compare Maya's account to Leo's?
-70 dollars
When you add two negative integers, the answer will always be (positive or negative?)
Negative
8 - ___ = 12
-4
104 + (-25)
-42 - 10
-52
Mt. Everest, the highest elevation in Asia, is 29,028 feet above sea level. The Dead Sea, the lowest elevation, is 1,312 feet below sea level. What is the distance between these two elevations?
30,340 feet
Use our subtraction rule to change this problem:
-10 - 15
-10 + (-15)
__ + (-5) = 20
+25
-342 + (-875)
-1217
30 - 58
-28
In the Sahara Desert one day it was 136 degrees fahrenheit. In the Gobi Desert a temperature of -50 degrees fahrenheit was recorded. What is the difference between these two temperatures?
186 degrees
When you find a sum you are ________.
When you find the difference you are _____________.
adding and subtracting
−7+__=2
9