简算5/11*1/20+3/11*1/2+5/11*1/5
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简算5/11*1/20+3/11*1/2+5/11*1/5
简算5/11*1/20+3/11*1/2+5/11*1/5
简算5/11*1/20+3/11*1/2+5/11*1/5
5/11*1/20+3/11*1/2+5/11*1/5
=5/11×1/20+5/11×3/10+5/11×1/5
=5/11×(1/20+6/20+4/20)
=5/11×11/20
=1/4
5/11*1/20+3/11*1/2+5/11*1/5=1/11*(1/4+3/2+1)=1/11*11/4=1/4
5/11*1/20+3/11*1/2+5/11*1/5
=(1/11)(5/20+3/2+5/5)
=(1/11)(11/4)
=1/4