简算5/11*1/20+3/11*1/2+5/11*1/5
问题描述:
简算5/11*1/20+3/11*1/2+5/11*1/5
答
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