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Wednesday, February 5, 2014

Dividing Mixed Fraction

This is for two mixed fractions. I came back here today to teach my 5th grader and noticed I haven't made a post for two mixed fractions. So here it is... Make the mixed fraction to improper fraction.

4 ¾ ÷ 1 ¼ = (let's do the first mixed fraction first) 4 x 4 = 16 add 3 = 19/4
                 = (second mixed fraction) 4 x 1 = 4 add 1 = 5/4

Now that all mixed fraction are in improper fraction we can divide. Well actually we can multiply by flipping the second fraction.

19/4  ÷  5/4 = 19/4 x 4/5 = multiply both denominator and both numerator...

19 x 4 = 76 are both the numerator

4 x 5 = 20 are both the denominator

= 76/20 (this is improper fraction, so we need to divide)

= 76  ÷  20 = 3-6/20 is the answer




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