41又1/3×3/4+51又1/4×4/5+61又1/5×5/6简算
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41又1/3×3/4+51又1/4×4/5+61又1/5×5/6简算
(124/3)x(3/4)+(205/4)x(4/5)+(306/5)x(5/6)
=31+41+51
=123
41又1/3×3/4+51又1/4×4/5+61又1/5×5/6简算
(124/3)x(3/4)+(205/4)x(4/5)+(306/5)x(5/6)
=31+41+51
=123