Question

2/3+12/7+10/3+9/7简便计算？

Answer 1

答案看图

Answer 2

2/3+12/7+10/3+9/7
=2/3+10/3+12/7+9/7
=12/3+21/7
=4+3
=7
这就是这道题的简便计算方法。