17.简便计算
| 478-163-137 | 214×27-14×27 | 500÷125÷8 |
| 99×34 | 5.17-1.8-3.2 | 9.16+3.54-9.16+6.46. |
16.停车场停了小轿车和自行车一共32辆,这些车共有108个轮子,小轿车有( )辆.
| A. | 27 | B. | 22 | C. | 20 |
15.15.11与151.1的和是( )
| A. | 100.11 | B. | 166.21 | C. | 151.11 |
14.570+273+27=570+300=870应用的是( )
| A. | 加法交换律 | B. | 乘法交换律 | C. | 加法结合律 |
13.下面个数中,读出两个“0”的数是( )
0 134759 134767 134773 134777 134783 134785 134789 134795 134797 134803 134809 134813 134815 134819 134825 134827 134833 134837 134839 134843 134845 134849 134851 134853 134854 134855 134857 134858 134859 134861 134863 134867 134869 134873 134875 134879 134885 134887 134893 134897 134899 134903 134909 134915 134917 134923 134927 134929 134935 134939 134945 134953 199269
| A. | 503.92 | B. | 200.08 | C. | 107.08 |