Tuesday, September 21, 2010

Adding and subtracting Integers

Adding and Subtraction Integers

A) 5+ -8 Since it is a positive 5 and a negative 8, you subtract 5 from 8 but since the negative number is greater the the positive number, the answer is negative which is -3.
B) -4+10 Since there is a negative 4 and a positive 10 you subtract 4 from 10 but since the positive number is greater then the negative number, the answer is positive which is 6
C)4-9 Since they are both positive you just subtract 9 from 4 which gives you a negative number. The answer is negative because the greater number is being subtracted from the littler number.
D)-8-(-9) Since they are both negative numbers, you add them together getting a negative number. You add them together because when you add numbers to a negative number, it get smaller. The answer is -17.

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