6.3头奶牛25天一共吃了饲料900千克,平均每头奶牛每天吃了饲料( )
| A. | 11千克 | B. | 12千克 | C. | 13千克 |
2.脱式计算下列各题,能简算的要简算.
| 2.69×99+2.69 | 1.25×2.3×0.8 | 3.17×5.6+4.4×3.17 |
| 38÷0.25÷0.4 | 6.5÷0.125 | 0.225÷0.25×4 |
1.用竖式计算(带*号的要验算).
0 140701 140709 140715 140719 140725 140727 140731 140737 140739 140745 140751 140755 140757 140761 140767 140769 140775 140779 140781 140785 140787 140791 140793 140795 140796 140797 140799 140800 140801 140803 140805 140809 140811 140815 140817 140821 140827 140829 140835 140839 140841 140845 140851 140857 140859 140865 140869 140871 140877 140881 140887 140895 199269
| 3.24÷0.36= | 35.88÷2.76= | *50.5÷2.5= |
| 6.8×1.09= | 23.5×7.6= | *1.3×8.5= |