If you multiply together two numbers with the same sign (i.e. two positives or two negatives) then your answer will always be a positive number.
For example, 2 * 2 = 4 and -2 * -2 = 4.
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rules of operation sign of numbers
You simply add the numbers: the answer has a positive sign.
If there are an odd number of numbers with a negative sign then the sign of the product is negative. Otherwise it is positive.
numbers with Like signs : result Plusnumbers with Unlike signs : result Minus
When multiplying integers, multiplying by the same sign will always produce a positive integer. Such as a negative times a negative equals a positive. If the signs are different then the product will be a negative.