15.华宝厂每天节约电20度,那么30天共节约( )度.
| A. | 120 | B. | 140 | C. | 600 |
14.估计22×43的结果可能正确的是( )
| A. | 786 | B. | 946 | C. | 1536 |
13.最大两位数与最小两位数的差是( )
| A. | 99 | B. | 990 | C. | 89 |
11.填表.
0 156796 156804 156810 156814 156820 156822 156826 156832 156834 156840 156846 156850 156852 156856 156862 156864 156870 156874 156876 156880 156882 156886 156888 156890 156891 156892 156894 156895 156896 156898 156900 156904 156906 156910 156912 156916 156922 156924 156930 156934 156936 156940 156946 156952 156954 156960 156964 156966 156972 156976 156982 156990 199269
| 单价(元) | 数量(个) | 总价(元) |
| 125 | 4 | 500 |
| 40 | 20 | 800 |
| 16 | 34 | 544 |