Multiplying and Dividing Decimals

• ​Multiply the numbers.

• ​How many numbers are there behind decimals TOTAL

• ​Place the decimal point in front of that many numbers on your answer

• ​.12 * .01 = .0012

• ​.04 * .4 = .016

• ​.8 * .8 = .64

• ​.9 * .005 = .0045

​This one is a bit more difficult

• ​First set it up as a normal long division leaving the decimals where they are

• ​Now make the first number (the one not under the division roof) an integer by moving the decimal all the way to the right.

• ​How ever many times you moved the decimal point right on the first number, move it that many times to the right on the other number as well.

• ​Continue long division as normal, but maintaining the decimal points new place.

​.24 / .8 = .3

​

​.50 / .05 = 10

​

​.897 / .09 = 9.966666666666

​If you don't feel like dividing... then multiply!

• ​Multiply your possible answers with the second number in the division problem. Whichever one results in the first number is the correct answer.