作业帮用简便方法计算:(0.75x42.6-0.574x25+57.4)/3
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/29 23:16:59
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用简便方法计算:(0.75x42.6-0.574x25+57.4)/3
用简便方法计算:(0.75x42.6-0.574x25+57.4)/3
用简便方法计算:(0.75x42.6-0.574x25+57.4)/3
(0.75x42.6-0.574x25+57.4)/3
=(0.75x42.6-57.4x0.25+57.4x1)/3
=(0.75x42.6+57.4x1-57.4x0.25)/3
=[0.75x42.6+57.4x(1-0.25)]/3
=[0.75x42.6+57.4x0.75]/3
=0.75x(42.6+57.4)/3
=0.75x100/3
=75/3
=25