12.25-(3.3-0.85)-7.7 能简便运算吗
问题描述:
12.25-(3.3-0.85)-7.7 能简便运算吗
答
=12.25-3.3+0.85-7.7
=(12.25+0.85)-(3.3+7.7)
=13.1-1.1
=12