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EXPLAIN WHY IT IS NECESSARY TO RENAME 4 1FORTH IF YOU SUBTRACT 3 FOURTH

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It's easier to subtract or add similar fractions, rather than fractions and whole numbers.

4 1/4 - 3/4 = ???

5/4 - 4/3 - 2/4 = 1/2
1/4 is lesser than 3/4 ,so 3/4 can not subtract from 1/4 .

4 1/4 gets renamed to 3 5/4

then 4 1/4 - 3/4 =3 5/4 - 3/4

=3 2/4
12
What is 737-2 and 821
I em dum
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