下面各题,怎样简便怎样算 1.
1、5分之1乘8除以5分之四,可以先算5分之1除以5分之4再算乘以8(1/5) x (5/4)x8=22、3/5 1/2 x 4/5 3、先算六分之五除以六分之五再除以三分之二 =3/5 2/5 5/6 除以2/3除以5/6 =5/5 =5/6除以5/6除以2/3 =1 =1除以2/3 ...全部
1、5分之1乘8除以5分之四,可以先算5分之1除以5分之4再算乘以8(1/5) x (5/4)x8=22、3/5 1/2 x 4/5 3、先算六分之五除以六分之五再除以三分之二 =3/5 2/5 5/6 除以2/3除以5/6 =5/5 =5/6除以5/6除以2/3 =1 =1除以2/3 =3/24、1-7/9除以7/8 =1-7/9 x8/7 =1-8/9 =1/9。
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