用简便方法计算:12/13*61/123+6/13*123
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:2024/07/31 02:41:59
用简便方法计算:12/13*61/123+6/13*123
![用简便方法计算:12/13*61/123+6/13*123](/uploads/image/z/2619258-42-8.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%EF%BC%9A12%2F13%2A61%2F123%2B6%2F13%2A123)
12/13*61/123+6/13*123
=12*61/13*123+6/13*123
=(12*61+6)/13*123
=(6*2+6)/13*123
=6*(2*61+1)/13*123
=6*123/13*123
=6/13
=12*61/13*123+6/13*123
=(12*61+6)/13*123
=(6*2+6)/13*123
=6*(2*61+1)/13*123
=6*123/13*123
=6/13