简算 80%[62.5%x(1-20%)]
问题描述:
简算 80%[62.5%x(1-20%)]
答
80%[62.5%x(1-20%)]
=0.8×(0.625×0.8)
=0.8×0.5
=0.4不能简算吗这样还不算简便?