2\5×18+4×320简便计算
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/06/17 04:22:57
2\5×18+4×320简便计算
5-5×2\5+3\5
5-5×2\5+3\5
![2\5×18+4×320简便计算](/uploads/image/z/16919829-45-9.jpg?t=2%5C5%C3%9718%2B4%C3%97320%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
/>(1)
2\5×18+4×320
=0.4×18+4×320
=7.2+1280
=1287.2
(2)
5-5×2\5+3\5
=5-2+3\5
=3+3\5
=3又3\5
2\5×18+4×320
=0.4×18+4×320
=7.2+1280
=1287.2
(2)
5-5×2\5+3\5
=5-2+3\5
=3+3\5
=3又3\5