67×48+53×67-67怎简便计算 46×78+78×39-85×58怎简便计算
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/19 15:55:48
![67×48+53×67-67怎简便计算 46×78+78×39-85×58怎简便计算](/uploads/image/z/362104-16-4.jpg?t=67%C3%9748%EF%BC%8B53%C3%9767%EF%BC%8D67%E6%80%8E%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97+46%C3%9778%EF%BC%8B78%C3%9739%EF%BC%8D85%C3%9758%E6%80%8E%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
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67×48+53×67-67怎简便计算 46×78+78×39-85×58怎简便计算
67×48+53×67-67怎简便计算 46×78+78×39-85×58怎简便计算
67×48+53×67-67怎简便计算 46×78+78×39-85×58怎简便计算
67×48+53×67-67
=67×48+53×67-67×1
=67×(48+53-1)
=67×100
=6700
46×78+78×39-85×58
=78×(46+39)-85×58
=78×85-85×58
=85×(78-58)
=85×20
=1700
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