Definition / Summary / How To / Steps How to ADD Integers
Rule #1: If the signs are the same, the answer keeps the sign.
Rule #2: If the signs are different, find the difference of the absolute value of the two numbers. Then take the sign of the integer with the greater absolute value.
How to SUBTRACT Integers
Subtracting integers takes three simple steps.
Rule #1: Keep the sign of the first integer.
Rule #2: Change subtraction to addition.
Rule #3: Flip the sign of the second integer.
How to MULTIPLY Integers
Rule #1: If you the all the integers have the same sign (+ or -), your answer will be positive.
Rule #2 : If they are different, your answer will be negative.
How to DIVIDE Integers
Rule #1: If you the all the integers have the same sign (+ or -), your answer will be positive.
Rule #2 : If they are different, your answer will be negative.
Easy Problems
If a moutain started 300 feet below sea level and rose to 525 feet above sea level, how tall, in total, is the mountain? Answer: 825 feet
Hard Problems
35-(-54)=? Answer: 89
784x(-34)=? Answer: -26,656
Mr. Polizzi wanted to dig a hole for his pool. He has to dig the hole in 3 days. His hole has to be 367centimeters into the ground. On the first day, he dug 245 centimeters into the ground. Then the next day he took a break beacause it rained. Hence, the water filled it up 57 centimeters. How many centimeters does Mr. Polizzi have to dig on day 3? Answer: 179 centimeters
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Definition / Summary / How To / Steps
How to ADD Integers
Rule #1: If the signs are the same, the answer keeps the sign.
Rule #2: If the signs are different, find the difference of the absolute value of the two numbers. Then take the sign of the integer with the greater absolute value.
How to SUBTRACT Integers
Subtracting integers takes three simple steps.
Rule #1: Keep the sign of the first integer.
Rule #2: Change subtraction to addition.
Rule #3: Flip the sign of the second integer.
How to MULTIPLY Integers
Rule #1: If you the all the integers have the same sign (+ or -), your answer will be positive.
Rule #2 : If they are different, your answer will be negative.
How to DIVIDE Integers
Rule #1: If you the all the integers have the same sign (+ or -), your answer will be positive.
Rule #2 : If they are different, your answer will be negative.
Easy Problems
4+3=? Answer: 7
-3x-5=? Answer: 15
-5/-1=? Answer: 5
51-12=? Answer: 39
If the elevator started on the 2nd floor in the basement and went up 3 floors, what floor would it end up on? Answer: The 1st floor
Medium Problems
20-(-42)=? Answer: 62
-5x12=? Answer: -60
60-(-53)=? Answer: 7
If a moutain started 300 feet below sea level and rose to 525 feet above sea level, how tall, in total, is the mountain? Answer: 825 feet
Hard Problems
35-(-54)=? Answer: 89
784x(-34)=? Answer: -26,656
Mr. Polizzi wanted to dig a hole for his pool. He has to dig the hole in 3 days. His hole has to be 367centimeters into the ground. On the first day, he dug 245 centimeters into the ground. Then the next day he took a break beacause it rained. Hence, the water filled it up 57 centimeters. How many centimeters does Mr. Polizzi have to dig on day 3? Answer: 179 centimeters
Pictures
Number line. [Online image] Available http://deadbunny.files.wordpress.com/2007/02/nl06.png?w=679&h=282, June 15th, 2010
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