小数的简算,12.56×12+125.6×4.3-1.256×450越快越好,我要参加世少赛
来源:学生作业学帮网 编辑:学帮网 时间:2024/06/05 20:47:10
小数的简算,12.56×12+125.6×4.3-1.256×450
越快越好,我要参加世少赛
12.56×12+125.6×4.3-1.256×450
=12.56×12+12.56×43-12.56×45
=12.56×(12+43-45)
=12.56×10
=125.6
12.56×12+125.6×4.3-1.256×450=(12+43-45)*12.56=125.6