已知lg2=0.3010,lg3=0.4771,则 lg20= lg200= lg2000= lg30= lg300= lg3000=

问题描述:

已知lg2=0.3010,lg3=0.4771,则 lg20= lg200= lg2000= lg30= lg300= lg3000=

lg20=lg2+lg10=1.3010 lg200=lg2+lg100 依次类推