第1个回答 2012-12-10
3又1/3-(5又1/2-2又2/3)-1/2
=3又1/3+2又2/3-5又1/2-1/2
=6-6
=0
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第2个回答 2012-12-10
解:3(1/3)-5(1/2)+2(2/3)-1/2
=3(1/3)+2(2/3)-(5(1/2)+1/2)
=6-6
=0
第3个回答 2012-12-10
3又1/3-(5又1/2-2又2/3)-1/2
=3又1/3-5又1/2+2又2/3-1/2
=(3又1/3+2又2/3)-(5又1/2+1/2)
=6-6
=0