6⼀7-(3⼀7-1⼀3)用简便方法计算

2024-11-28 10:57:27
推荐回答(2个)
回答(1):

6/7-3/7+1/3=3/7+1/3=16/21

回答(2):

6/7-(3/7-1/3)
=6/7-3/7+1/3
=3/7+1/3
=16/21