没有简便啊
=(1/4-1/16)*3*(2/9+1/3)
=(4/16-1/16)*(3*2/9+3*1/3)
=3/16*(2/3+1)
=1/16*(3*2/3+3*1)
=1/16*(2+3)
=1/16*5
=5/16
3/5+3/4-5/6 8/9+2/7+5/7 15/8-3/4-1/4 =36/60+45/60-50/60 =8/9+1 =15/8-1 =31/60 =17/9 =7/8 9/7-1/6+3/7 7/4-12/23-3/4 5-6(3/8+1/6) = 12/7-1/6 = 1-12/23 =5-(9/4+1) = 72/42-7/42 =11/23 =7/4 =65/42
很不错哦，你可以试下
s▇dさ纽wrьm学t通痢
（3/4-3/16）*（2/9+1/3）
=9/16*（2/9+1/3）
=9/16*2/9+9/16*1/3
=1/8+3/16
=5/16
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