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Our counting system is based on ten.

A number such as 456.78 is

4 lots of 102 = 10*10

5 lots of 101 = 10

6 lots of 100 = 1

7 lost of 10-1 = 1/10

8 lost of 10-2 = 1/100

Counting in tens is, therefore, something most of us are already familiar with and some of us are skilled at.

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13y ago

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