计算.1、直接算出得数.7.8×0.5 3.78÷6 8.1÷0.9 98÷0.116.4÷4 1.92÷0.3 1.09+9.01 80×0.251.3-0.7 0.88+0.2 0.01×800 2.4×0.52、估算下面各题.4.03×1.98 3.95×0.2 8.1×10.01 16.2÷1.959.8÷3.1 10.32÷0...
计算.1、直接算出得数.7.8×0.5 3.78÷6 8.1÷0.9 98÷0.116.4÷4 1.92÷0.3 1.09+9.01 80×0.251.3-0.7 0.88+0.2 0.01×800 2.4×0.52、估算下面各题.4.03×1.98 3.95×0.2 8.1×10.01 16.2÷1.959.8÷3.1 10.32÷0...