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数学
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巧算28.45-7.5+2.55+2.5
人气:187 ℃ 时间:2020-04-09 22:29:44
解答
28.45-7.5+2.55+2.5
=28.45+2.55+2.5-7.5
=31-5
=26
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用简便方法计算:3.75-5.28-4.72 8.56-(5.56+1.4) 3.45+8.76+16.55+1.3 17.83-9.5-7.83-0.5
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