77×0.16÷7.7×12.5 怎么简便运算?
问题描述:
77×0.16÷7.7×12.5 怎么简便运算?
答
77×0.16÷7.7×12.5
=77÷7.7×0.16×12.5
=10×0.2×0.8×12.5
=2×10=20