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Double-digit division requires that you create as many two-digit dividends as needed by bringing down another digit, or by adding a zero behind the decimal point.

Example: 318/15 = 21.2

The first division is 15 into 3, which does not go. So the next step is to use the 3 and the 1 -- 15 into 31 is 2, with a remainder of 1. Now bring down the 8 and divide 15 into 18, which is 1 with a remainder of 3. Finally, place a decimal point and create a zero after it (the dividend now reads 318.0) so that you can divide 15 into 30 -- which is 2 and comes after the decimal.

This long division is easier to demonstrate graphically.

_____21.2__

15 / 318.0

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โˆ™ 2011-10-12 01:04:02
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Q: How do you do double digit division?
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