Peter's calculation

Peter wrote the following: 7 1/4 - 3 3/4 = 4 2/4 = 4 1/2 . Is Peter's calculation correct? Using words (math vocabulary) and numbers to explain why he is correct or incorrect.



Step-by-step explanation:

a=741=7+41=47 4+1=428+1=429=741=7.25 b=343=3+43=43 4+3=412+3=415=343=3.75  c=ab=429415=42915=414=27=321=3.5 x=0

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Showing 2 comments:
Dr Math
Can't be subtracted whole parts and fractions part in opposite direction.

7 1/4 - 3 3/4 = whole (7-3) and fraction part (3-1)/4 = 4 and fraction part 2/4 = 4 1/2

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