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13问答网 > 7⼀9+2⼀3-（1⼀3+4⼀9）怎样简便就怎样计算

7⼀9+2⼀3-（1⼀3+4⼀9）怎样简便就怎样计算

2025-03-16 03:44:19

推荐回答（2个）

回答1：

这道题啊，不如先把括号拆开，这样就得到：7/9+2/3-1/3-4/9，然后合并同类项，也就是分母相同的互相计算。得到：3/9+1/3最后再通分。这样也比直接计算简便一点。

回答2：

7/9+2/3-（1/3+4/9）=7/9+2/3-1/3-4/9=7/9-4/9+2/3-1/3=3/9-1/3+2/3=2/3

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