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数学
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120÷24-1.5×1.2 8/9×{3/4-(9/10-3/8)} 315+540÷12×13 简便计算
人气:195 ℃ 时间:2019-11-08 08:42:02
解答
120÷24-1.5×1.2
=5-1.8
=3.2
8/9×{3/4-(9/10-3/8)}
=8/9X{(30/40-(36/40-15/40)}
=8/9X9/40
=1/5
315+540÷12×13
=315+45X13
=315+585
=900
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