五上数学计算题专项训练:小数乘除法 ★计算下面各题,怎样简便就怎样算。★ [75-(12+18)]÷15 =[75-30]÷15 =45÷15 =3 (6.8-6.8×0.55)÷8.5 =(6.8-3.74)÷8.5 =3.06÷8.5 =0.36 1.7×4.7+4.7+4.3×4.7 =4.7×(1.7+1+4.3) =4.7×(2.7+4.3) =4.7×7 =32.9 5+25×44 =5+25×(40+4) =5+(25×40+25×4) =5+(1000+100) =5+1100 =1105 98.5-14.82÷7.6×3.2 =98.5-1.95×3.2 =98.5-6.24 =92.26 15÷0.25 =(15×4)÷(0.25×4) =60÷1 =60 35×8+35×6-4×35 =35×(8+6-4) =35×(14-4) =35×10 =350 1.6×7.5×1.25 =(0.2×8)×7.5×1.25 =0.2×7.5×8×12.5 =(0.2×7.5)×(8×12.5) =1.5×10 =15
