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How do we do 3 x -1


Question asked by: knowitall

To multiply by a minus sign all you have to do is do the multiplication as normal: 3 x 1 is of course 3.

Then put the minus sign at the front, so the answer is -3.

If there are 2 minus signs, they cancel out, e.g. -3 x -3 = 9

By: Unknown
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Next question: If you have two numbers,that are different ie,12 then you turn it round,21, take the lower number away from the higher number ,why does the answer always work out as 9 whatever two number you chose?


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