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数学
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54.2-(2/9)+4.8-(16/9) = 57 简便计算!
人气：209 ℃ 时间：2020-01-27 08:42:20
解答
54.2-(2/9)+4.8-(16/9)
=(54.2+4.8)-(2/9+16/9)
=59-18/9
=59-2
= 57
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