helpingwithmath.com › multiplying-dividingMultiplying & Dividing Decimals by Powers of 10 | Examples ... Rules for multiplying and dividing decimals by powers of 10. The rules pertaining to the operation of numbers in scientific notation can be summarised as . If the given number is multiples of 10 then the decimal point has to move to the left, and the power of 10 will be positive. For example 7000 can be written as 7 × 10 3 is in scientific ...