2.数的世界(2) 1. 3.2 0.09 70 3.1 4 3 2. 3. 7.95+0.46+9.54 =7.95+(0.46+9.54 ) =7.95+10 =17.95 5.4×0.33+5.4×0.67 =5.4×(0.33+0.67) =5.4×1 =5.4 9÷0.75+9÷0.75 =(9+9)÷0.75 =18÷0.75 =24 4.56×[1÷(4.1-4.09)] =4.56×[1÷0.01] =4.56×100 =456 4. 9.8-1.4-2.1=6.3(吨) 6.3÷3=2.1(吨) 答:还剩6.3吨,如果剩下的货物要分3次运完,平均每次运2.1吨。 |