Subtracting Integers
Subtract the integers
7 - 10
What is -3?
Add the integers
16+(-32)
-16
Multiply the integers
-3 x 12
-36
Divide the integers
-15 ÷ 3
-5
Any number times 0 is ?
0
What are the rules for adding Integers?
Same sign, add
Different sign, subtract
Subtract the integers
-105 - 27
-132
Add the integers
-233.65+32.5
-201.15
Multiply the integers
30 x -6
-180
Divide the integers
-121 ÷ 11
-11
|-405|
405
What are the rules for subtracting Integers?
Keep, Change, Change
1. Keep the 1st number
2. change addition to subtraction
3. Change 2nd number to its opposite.
4. Follow rules of addition
5. Keep the sign of the larger absolute value.
Subtract the integers
655- (-40.4)
695.4
Add the integers
-985+ (-116)
-1101
-1/4 * (-3/4)
3/16
Divide the integers
-144 ÷ -12
12
What is an integer?
A whole number, positive or negative including zero.
What are the rules for multiplying Integers?
Multiply and then look at the signs (same positive, different, negative).
Subtract the integers
-3/4 - (-1/4)
-2/4
Add the integers
-102 + (-304)
-406
-47 x 63
-2,961
Divide the integers
-6 ÷ -1.5
4
The temperature in a city is -5 degrees in the morning. By the afternoon, the temperature rises by 12 degrees. What is the temperature in the afternoon?
The temperature in the afternoon is 7 degrees.
What are the rules for dividing Integers?
Divide the numbers and then look at the signs.
(same positive, different negative)
Subtract the integers
-684 - (-765)
81
Add the integers
-2/3+1/4
-5/12
Multiply the integers
-509*(-9)
4,581
Divide the integers
-2/3 divide 5/8
-16/15
First person to do a push gets to take 500 points away from any team.
THAT's TOUGH!
A submarine is currently 300 meters below sea level. It ascends 120 meters. What is the new altitude of the submarine?
The submarine is now 180 below sea level.