6．直接写出得数．
| 300×50= | 200×4= | 42×20= | 900×8= |
| 6×600= | 30×700= | 60×30= | 200×40= |
| 60×15= | 320×20= | 60×500= | 400×40= |
5．直接写得数．
0 157800 157808 157814 157818 157824 157826 157830 157836 157838 157844 157850 157854 157856 157860 157866 157868 157874 157878 157880 157884 157886 157890 157892 157894 157895 157896 157898 157899 157900 157902 157904 157908 157910 157914 157916 157920 157926 157928 157934 157938 157940 157944 157950 157956 157958 157964 157968 157970 157976 157980 157986 157994 199269
| 360÷4= | 20×40= | 9.8-8.6= | 2.4+3.8= |
| 380×0= | 280÷7= | 21×4= | 800÷8= |
