72÷[(12 24)÷9]递等式,求助 72÷[(12+24)÷9]怎么简算
\u8ba1\u7b97\uff1a72\u00f7[\uff0812+24\uff09\u00f79]\uff0e72\u00f7[\uff0812+24\uff09\u00f79]
=72\u00f7[36\u00f79]
=72\u00f74
=18
18
72÷[(12+24)÷9]
=72÷(36÷9)
=72÷4
=18
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