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16×20-2400÷48,720-(750÷15+250)的简便计算
人气:442 ℃ 时间:2020-06-08 19:05:48
解答
16×20-2400÷48
=320-50
=270
720-(750÷15+250)
=720-(50+250)
=720-300
=420
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