To multiply decimals by 10, 100, and 1000, use place value labels. Write the digits of the decimal using place value labels. Start with the first non-zero digit. To multiply by 10 move each digit ...

To multiply by 10, you move the digits one place value to the left. So 4.2 x 10 = 42. We don’t have any numbers after the decimal point now so we don’t have to include it! To multiply by 100 ...