Comparing mixed numbers

Which of the following expression will give a sum of 7 and 3/10?
A. 3 and 1/5+ 4 and 2/2
B. 3 and 1/10+4 and 2/10
C. 1/10+ 7 and 2/5
D. 2 and 1/10+ 5 and 3/10

Correct answer:

x = B

Step-by-step explanation:

v=7103=7+103=107 10+3=1070+3=1073=7103=7.3  A=351+2/2=521=451=4.2 B=3101+4102=1031+1042=1031+42=1073=7103=7.3 C=101+752=101+537=101+1074=101+74=1075=215=721=7.5 D=2101+5103=1021+1053=1021+53=1074=537=752=7.4  B=v=7103 x=B

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