Arithmetic Grade Five
Lesson Thirty-three: Negative Numbers
Once we know whether an answer is positive, negative, or zero, we can find
the difference between the numbers. Here's an example using larger numbers.
We know the answer will be negative since 153 is larger than 132. The
easiest way to find the difference between the two numbers is to just
subtract like this 153-132=21. BUT we must remember that the answer we get
must be made negative and so the real answer is -21.
Here's another example:
We know the answer will be negative since the 579 is larger than 455, but in
order to do this problem most of us will need to rewrite it like this:
BUT we keep in mind that the real answer must be negative and so we place a
minus sign in front of the answer like this: -124.
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