Multiplying & Dividing Decimals

3 Strategies to Multiply Decimals :)

DFD approach (decimal --> fraction --> decimal)

• convert your decimal to a fraction, multiply, and then convert back to a decimal
• best when there are NO whole numbers!

Inverse by 10s approach (opposites!)

• change your factors to whole numbers by multiplying by multiples of 10
• balance your product by dividing by the equivalent of your multiples of 10

Ignore & Bring Back approach

• multiply as if there were no decimals!
• count the total places behind the decimals of your factors
• move your decimal that number of places from the right

Dividing Decimals

If a decimal is on the side....slide / slide

If you're dividing by a whole number and the decimal is only in the house, you raise it to the roof!