41又1/3×3/4+51又1/4×4/5

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41又1/3×3/4+51又1/4×4/5
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41又1/3×3/4+51又1/4×4/5
41又1/3×3/4+51又1/4×4/5

41又1/3×3/4+51又1/4×4/5
41又1/3×3/4+51又1/4×4/5
=(40+4/3)×3/4+(50+5/4)×4/5
=30+1+40+1
=72