Testing formats for Mini-BCs (Vibeke)
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Divide a decimal with 4 decimal places by 0.1
Q1 20 How do you divide a decimal with 4 decimal places by 0.1?
When dividing a four decimal place number, for instance 0.1234, by 0.1 you are essentially multiplying the number by 10. Remember that 0.1 can be written as the fraction 1/10. So, dividing by 0.1 is the same as dividing by the fraction 1/10. Using the formula for dividing a number by a fraction assures that dividing by 1/10 is the same as multiplying by 10.
Since 0.1 is 1/10, the reciprocal is 10/1 which is 10.
So as you see, dividing by 0.1 is the same as multiplying by 10.
This operation effectively shifts the decimal point one place to the right, increasing the value of the original number by a factor of ten. This method works consistently due to the properties of the dividing a number by a fraction.
