(3又1/2+1/5-1/4)×20/(1+5/6)÷3又2/3

如题所述

第1个回答  2012-11-10
(3又1/2+1/5-1/4)×20/(1+5/6)÷3又2/3
=(7/2+1/5-1/4)×20/(11/6)÷11/3
=(70+4-5)/(11/6)×3/11
=69×6/11×3/11
=1242/121
第2个回答  2012-11-10
(3又1/2+1/5-1/4)×20/(1+5/6)÷3又2/3
=(3又1/2×20+1/5×20-1/4×20)/(11/6×11/3)
=(70+4-5)/(1/2)
=69×2
=138本回答被提问者采纳
第3个回答  2012-11-10
(3又1/2+1/5-1/4)×20
=3又1/2×20+1/5×20-1/4×20
=70+4-5
=69

(1+5/6)÷3又2/3
=11/6×3/11
=1/2
第4个回答  2012-11-10
(7/2-1/20)×20/(11/6)÷(11/3)=69/20×120/11×3/11=1242/121
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