8⼀17-5⼀9+7⼀17-4⼀9简便算

2024-11-18 06:18:47
推荐回答(2个)
回答1:

8/17-5/9+7/17-4/9
=(8/17+7/17)-(5/9+4/9)
=15/17-1
=-2/17

回答2:

8/17-5/9+7/17-4/9
=(8/17+7/17)-(5/9+4/9)
=15/17-1
=-2/17
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