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where does the period go in the number 2,560,000,000

 Oct 13, 2017
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Multiplying a number by  10  moves the decimal point to the right one place.

For example...      2 * 10  =  20     and     0.7 * 10  =  7

 

When we multiply  2.56  by  1,000,000,000 , we are multiplying  2.56  by  10 , 9 times.

So we need to move the decimal point to the right  9  places.

 

2.56 * 1,000,000,000  =  2,560,000,000.0

 

The decimal point goes at the very end of  2,560,000,000 , but it isn't necessary to write it since only zeros follow it.

 Oct 13, 2017
edited by hectictar  Oct 13, 2017

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