6.6+0.6×20+0.×19 简便运算
问题描述:
6.6+0.6×20+0.×19 简便运算
答
6.6+0.6×20+0.6×19
=0.6×11+0.6×20+0.6×19
=0.6×(11+20+19)
=0.6×50
=30