5.4x2.08+56x0.208-2.08简便计算
问题描述:
5.4x2.08+56x0.208-2.08简便计算
答
5.4x2.08+56x0.208--2.08
=5.4x2.08+5.6x2.08--2.08
=(5.4+5.6--1)x2.08
=10x2.08
=20.8.