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
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![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](/uploads/image/z/18329-41-9.jpg?t=%E5%B0%8F%E6%95%B0%E7%9A%84%E7%AE%80%E7%AE%97%2C12.56%C3%9712%2B125.6%C3%974.3-1.256%C3%97450%E8%B6%8A%E5%BF%AB%E8%B6%8A%E5%A5%BD%EF%BC%8C%E6%88%91%E8%A6%81%E5%8F%82%E5%8A%A0%E4%B8%96%E5%B0%91%E8%B5%9B)
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
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
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