7.8*1.25+8等于几?(要巧算)
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/08 08:12:07
7.8*1.25+8等于几?(要巧算)
原式=(8-0.2)*1.25+8
=8*1.25-1/5*1.25+8
=10-0.25+8
=9.75+8
=17.75
7.8*1.25+8
=7.8×5/4+8
=39/4+8
=9.75+8
=17.75
7.8*1.25+8等于几?(要巧算)
原式=(8-0.2)*1.25+8
=8*1.25-1/5*1.25+8
=10-0.25+8
=9.75+8
=17.75
7.8*1.25+8
=7.8×5/4+8
=39/4+8
=9.75+8
=17.75