Start by completing the calculation using positive numbers first, then use the sign rules to find the sign of the answer. Image caption, This multiplication table includes both positive and negative ...
Same signs give a positive: \((-4) \times (-5) = 20\) Same signs give a positive: \(20 \div 5 = 4\) Different signs give a negative: \((-14) \div 2 = -7\) Different ...
Multiplying 2 x 2 is easy. But multiplying two numbers with more than a billion digits each — that takes some serious computation. The multiplication technique taught in grade school may be simple, ...
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