用简便方法计算:(0.75x42.6-0.574x25+57.4)/3

来源：学生作业学帮网编辑：学帮网时间：2024/05/16 07:42:04

(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

用简便方法计算:(0.75x42.6-0.574x25+57.4)/3 练习册80) 用简便方法计算（o.75x42.6—o.574x25+57.4)÷3 用简便方法算 79^2+79X42+21^2 用简便方法计算, 用简便方法计算用简便方法计算. 用简便方法计算：用简便方法计算, 用简便方法计算用简便方法计算用简便方法计算, 用简便方法计算? 用简便方法计算. 用简便方法计算, 用简便方法计算：用简便方法计算用简便方法计算. 用简便方法计算.