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I'm no expert but I'm guessing this may help you...

odd x odd = odd

even x even = even

odd x even = even

for negatives and positive multiplying...

n x n = p

p x p = p

n x p = n

i hope this helps you!

another thing that works is halving and doubling for example:

16x15=240

8x30=240

4x60=240

2x120=240

1x240=240

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13y ago

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Q: What are the rules for multiplying?
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