Explain how multiplying a whole number and a decimal is similar to and different from multiplying whole numbers

Explanation:

The process is very similar. We multiply the digits the same was as we would multiply whole numbers. We start at the last place value and multiply, working our way left with each line. At the end of the process, we add the lines together.

The difference comes with the decimal point. After we are finished multiplying, we count the number of digits behind a decimal (total) in the problem. This is how many digits will be behind a decimal in the answer.

180

step-by-step explanation:

12-2=10

20-2=18

18x10=180