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Mathematics 7 Online
OpenStudy (anonymous):

does anyone know how to solve complex fractions?

jimthompson5910 (jim_thompson5910):

what is the full problem?

OpenStudy (anonymous):

|dw:1379899192159:dw|

jimthompson5910 (jim_thompson5910):

you have two fractions (circled) |dw:1379899261220:dw| and they are being divided

OpenStudy (anonymous):

Alright

jimthompson5910 (jim_thompson5910):

so what you do is multiply the top fraction by the reciprocal of the bottom fraction like this \[\large \frac{-2}{ab^2} \times \frac{a}{5}\]

jimthompson5910 (jim_thompson5910):

multiply straight across, then simplify

OpenStudy (anonymous):

-2a/5ab^2

jimthompson5910 (jim_thompson5910):

good \[\large \frac{-2a}{5ab^2}\]

jimthompson5910 (jim_thompson5910):

now reduce

OpenStudy (anonymous):

-2/5b^2

jimthompson5910 (jim_thompson5910):

perfect, the final answer is \[\large -\frac{2}{5b^2}\]

OpenStudy (anonymous):

4y+1/9y^4 x y/y+2 this is after I flipped the second reciprocal

jimthompson5910 (jim_thompson5910):

so you have \[\large \frac{4y+1}{9y^4} \times \frac{y}{y+2}\] right?

OpenStudy (anonymous):

Yes

jimthompson5910 (jim_thompson5910):

multiply straight across

jimthompson5910 (jim_thompson5910):

what do you get?

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