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四年级简便运算:284+636-365+126 (180-140)×7-160 15×4×25×6
人气:255 ℃ 时间:2020-05-21 12:09:46
解答
284+636-365+126 (180-140)x7-160 15x4x25x6 =284+126+636-365 =40x7-160 =4x25x15x6 =410+636-365 =180-160 =100x15x6 =1046-365 =20 =1500x6 =681 =9000
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