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

问题描述:

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+43-45)*12.56=125.6

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