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93.7 5.55-1.8 +4.45-1.9 简算
人气:348 ℃ 时间:2020-07-02 21:00:15
解答
93.7+5.55-1.8 +4.45-1.9
=93.7-(1.8-1.9)+(5.55+4.45)
=93.7-3.7+10
=90+10
=100
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