Olivia's International Fun on MSN
A simple multiplication trick for two digit numbers
Olivia shares a simple multiplication trick that makes two digit multiplication easier when the numbers end in 1.
The first line of the calculation is the same procedure as multiplying with a single digit number. In the second line we are multiplying by \(20\) (two tens). As we are multiplying by tens the unit's ...
People tend to obsess over making computer software faster. You can, of course, just crank up the clock speed and add more processors, but often the most powerful way to make something faster is to ...
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