五年级上册数学《小数乘法》简便计算 小数乘法简便计算(1) 1.25×4.37×0.8 =1.25×0.8×4.37 =1×4.37 =4.37 6.4×1.33+3.6×1.33 =1.33×(6.4+3.6) =1.33×10 =13.3 7.83×10.3-7.83×0.3 =7.83×(10.3-0.3) =7.83×10 =78.3 10.5×8.5+10.5×1.5 =10.5×(8.5+1.5) =10.5×10 =105 6.74×99+6.74 =6.74×(99+1) =6.74×100 =674 0.038×4×0.25 =0.038×(4×0.25) =0.038×1 =0.038
