8.81.25+10.42.5的简便计算

分类: 作业答案 • 2021-12-19 12:05:19

问题描述：

8.8*1.25+10.4*2.5的简便计算

答

=（8+0.8）*1.25+（10+0.4）*2.5
=8*1.25+0.8*1.25+10*2.5+0.4*2.5
=10+1+25+1
=37

答

8.8*1.25+10.4*2.5
=(8+0.8)*1.25+(10+0.4)*2.5
=8*1.25+0.8*1.25+10*2.5+0.4*2.5
=10+1+25+1=37

答

8.8*1.25+10.4*2.5
=8*1.25*1.1+（10+0.4）*2.5
=11+25+1
=37

8.8*1.25+10.4*2.5的简便计算