When you divide a decimal by 10, 100 or 1,000, the place value of the digits decreases. The number decreases in value by 10, 100 or 1,000 times. The digits move to the right as the number gets smaller ...

Dividing is the opposite of multiplying. When you divide a decimal number by 10, 100 and 1000, the place value of the digits in the number decrease. Place value is the position of a digit in a number.

NPR's Scott Simon talks to math historian Glen Van Brummelen about his finding that the decimal point appeared in the 1440s, earlier than thought. How did the decimal point come to be? - the dot that ...