6th grade Q1
To multiply a decimal number by 0.01 mentally, you can use a simple technique that involves moving the decimal point.
When you multiply by 0.01, you are essentially dividing the number by 100.
This means you need to move the decimal point two places to the left.
Example 1:
If you have the number 7392.18, multiplying it by 0.01 would involve moving the decimal point two places to the left, resulting in 73.9218.
Example 2:
Similarly, for a number like 0.275, multiplying by 0.01 would give you 0.001278. Remember that adding one or more 0's to the left of a number doesn't change the number's value.
Example 3:
Finally, let's see how you multiply a whole number by 0.01. Remember, every whole number has an invisible decimal point at the end. Multiply 37 by 0.01. would involve moving the decimal point two places to the left, resulting in 0.37.
This method is efficient and quick, allowing you to perform the calculation without needing paper or a calculator.
