五年级上册《小数简便运算》拔尖小练习 姓名: 班级: 学号: 类型1.脱式计算。 0.38×102 =0.38×(100+2) =0.38×100+0.38×2 =38+0.76 =38.76 8.4×6.9÷(6.44-4.14) =8.4×6.9÷2.3 =8.4×3 =25.2 类型2.脱式计算,能简算的要简算。 8.7×10.1÷0.87 =8.7÷0..87×10.1 =10×(10+0.1) =10×10+10×0.1 =100+1 =101 78÷0.25÷0.4 =78÷(0.25×0.4) =78÷0.1 =780 2.4÷3.2+1.7 =0.75+1.7 =2.45