18.下面算式中,与15×160的计算结果不同的算式是( )
A. | 150×16 | B. | 30×80 | C. | 30×320 | D. | 60×40 |
17.从7:00到7:30,分针旋转了( )
A. | 30° | B. | 90° | C. | 180° | D. | 60° |
9.用竖式计算.
0 154903 154911 154917 154921 154927 154929 154933 154939 154941 154947 154953 154957 154959 154963 154969 154971 154977 154981 154983 154987 154989 154993 154995 154997 154998 154999 155001 155002 155003 155005 155007 155011 155013 155017 155019 155023 155029 155031 155037 155041 155043 155047 155053 155059 155061 155067 155071 155073 155079 155083 155089 155097 199269
99×18= | 17×91= | 70×39= |
126÷3= | 256÷4= | 196÷7= |