7.25+8.25+9.25+10.25的简便计算
问题描述:
7.25+8.25+9.25+10.25的简便计算
答
7.25+8.25+9.25+10.25
=7+0.25+8+0.25+9+0.25+10+0.25
=(7+8+9+10)+0.25*4
=34+1
=35