(1/15+2/17)÷8+15/17简便计算
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(1/15+2/17)÷8+15/17
=(1/15+2/17)/8+15/17
=1/120+1/68+15/17
=1/120+(1/68+15/17)
=1/120+61/68
=(17+30×61)/(17×120)
=1847/2040
=(1/15+2/17)/8+15/17
=1/120+1/68+15/17
=1/120+(1/68+15/17)
=1/120+61/68
=(17+30×61)/(17×120)
=1847/2040
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