用简便算法:2/3一5/6×3/10+3/2，7/4÷(2/3+1/2)x4/5，8/15÷9+1
用简便算法:2/3一5/6×3/10+3/2，7/4÷(2/3+1/2)x4/5，8/15÷9+1/9x7/15，[4一(3/4一3/8)]×4/29...
用简便算法:2/3一5/6×3/10+3/2，7/4÷(2/3+1/2)x4/5，8/15÷9+1/9x7/15，[4一(3/4一3/8)]×4/29
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2/3一5/6×3/10+3/2
=2/3-1/亮茄4+3/2
=（8-3+18）/12
=23/12
7/4÷(2/3+1/2)x4/5
=(7/4*4/5)/(7/6)
=7/5*6/7
=1.2
8/15÷9+1/9x7/15
=1/15*(8/9+7/9)
=1/15*15/敬颂察9
=1/9
[4一(3/4一3/8)]×4/29
=[4-3/樱亏8]*4/29
=29/8*4/29
=1/2
=2/3-1/亮茄4+3/2
=（8-3+18）/12
=23/12
7/4÷(2/3+1/2)x4/5
=(7/4*4/5)/(7/6)
=7/5*6/7
=1.2
8/15÷9+1/9x7/15
=1/15*(8/9+7/9)
=1/15*15/敬颂察9
=1/9
[4一(3/4一3/8)]×4/29
=[4-3/樱亏8]*4/29
=29/8*4/29
=1/2
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