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7.93乘6.74减(7.43减0.69)乘7.9简便方法计算
人气:306 ℃ 时间:2020-03-31 03:58:21
解答
7.93×6.74-(7.43-0.69)×7.9
=7.93×6.74-6.74×7.9
=7.93×(6.74-6.74)
=0
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