how-to-divide-positive-and-negative-integers

Interactive video lesson plan for: How to divide positive and negative integers

Activity overview:

http://www.moomoomath.com/Dividing-positive-and-negative-integers.html

Dividing positive and negative integers
Today we are going to go over division. Here are our examples. Twenty divided by negative two which is negative ten. Negative twelve divided by negative three is positive four. The third one is negative eighteen divided by positive nine is negative two. Now let's go over the rules for dividing positive and negative integers. The rules are just like addition and subtraction rules. If you have a negative divided by a negative those two are pairs so we have a positive, so negatives always come in pairs. Negative divided by a positive, the negative doesn't have a pair so the answer is negative. Positive divided by negative. Again the negative doesn't have a pair so the answer is negative. Finally a positive divided by a positive is positive. So let's go back and look at our original problems in slow motion. So the first problem is a positive divided by a negative. We only have one negative and it doesn't have a partner therefore the answer is negative. On the second one we have negative twelve and this fraction is another way of saying division e divided by negative three. These two negatives are partners and pair up therefore my answer is positive. The third one is negative eighteen divided by a positive nine, since we only have one negative the answer must be negative, eighteen divided by nine is two. So there are our answers.

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Tagged under: How ,algebra ,dividing sign numbers,math ,moomoomath

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