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Mathematics 8 Online
OpenStudy (anonymous):

2 2/7 – 1 1/3 =

hero (hero):

Hint: (2 - 1) + (2/7 - 1/3) Ideally, you want to subtract the whole numbers separately and subtract the fractions separately.

hero (hero):

So first, I would set up to combine the first and second fractions: (2 - 1) + (6/21 - 7/21) However the first fraction is smaller than the second fraction, so I can't subtract yet.

hero (hero):

I have to borrow 1 = 21/21 from the whole numbers and add it to the first fraction to get: (1 - 1) + (27/21 - 7/21)

hero (hero):

I hope you understand what I did there.

OpenStudy (anonymous):

thank you

hero (hero):

Did you understand the steps, and do you have the final answer? If so let me know what you got.

OpenStudy (anonymous):

how did u get 21

hero (hero):

Do you know what an LCD is?

hero (hero):

3 x 7 = 21

OpenStudy (anonymous):

ok lowest common demontator

OpenStudy (nali):

still need help?

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