7⼀15-1⼀18-1⼀18-1⼀18-1⼀18怎么算的过程?

2025-04-17 11:17:28
推荐回答(1个)
回答1:

7/15-1/18-1/18-1/18-1/18
=7/15-4×1/18
=7/15-2/9
=21/45-10/45
=11/45