5⼀7-(1⼀8+4⼀7)简便运算怎么写?

2025-05-19 15:20:36
推荐回答(2个)
回答1:

5/7-(1/8+4/7)
=5/7-1/8-4/7
=5/7-4/7-1/8
=1/7-1/8
=8/56-7/56
=1/56

回答2:

=5/7-1/8-4/7
=5/7-4/7-1/8
=1/7-1/8
=8/56-7/56
=1/56