Question Detail

I need an examples on how to multiply a whole fraction for example. 2 1/3 x 4 3/5 eaquals

Sep 24, 2013 4:16pm

  • Common Core

2

  • You must sign in before we can post your answer.
    Don't have an account? Sign up only takes a few seconds.

    • Sep 24, 2013 9:45pm

      Most videos online for this type of problem show the algorithm with little explanation of what is happening with the numbers. I did find an area model explanation on Lernzillion for a whole number multiplied by a mixed number. The URL is: http://learnzillion.com/lessons/216-multiply-whole-numbers-by-mixed-numbers-using-area-models. This same model could be used for multiplying two mixed numbers as well.

      • Sep 27, 2013 8:29pm

        In my class we talk about what each piece means. For example 2 1/3 x 4 3/5 is the same thing as (2 + 1/3) * (4 + 3/5) and we look at the math that way we multiply (2*4) + (2* 3/5) + (1/3*4)+(1/3*3/5). I have noticed kids can handle this sometimes easier than trying to convert to improper fractions then multiplying.

        The area models are great too!