Explain why it is necessary to rename 4 1/4 if you subtract 3/4 from it.

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Question:

explain why it is necessary to rename 4 1/4 if you subtract 3/4 from it.

Answers

Renaming fractions is also called "borrowing" - it's because you borrow fraction parts from the wholes of a mixed number. this is necessary when, if you subtract, the subtracted fraction part is bigger than the fraction part of the number from which you subtract: so here 3/4 is bigger than 1/4 and we need to borrowif we wanted to subtract 3/4 from 4 1/4 then you're stuck: how do you subtract 3/4 from 1/4? you can't, but you can change 4 1/4 into 3 5/4 !!!! it's the same number, you just borrowed from the whole unmbers and put into the fraction!now we can subtract: 3 5/4-3/4 is 3 2/4[tex] 3\frac{5}{4}- \frac{1}{3} =3 \frac{2}{4} =3\frac{1}{2} [/tex]

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