18.口算
| 240÷8= | 300÷2= | 35×20= | 23×30= |
| 200÷5= | 621÷3= | 51×80= | 40×11= |
17.78×4□≈3200,□里最大填( )
| A. | 9 | B. | 5 | C. | 4 |
16.积的末尾有3个0的算式是( )
| A. | 125×8 | B. | 3000+3000 | C. | 40×60 |
15.玩具店购进“喜洋洋”玩具66个,“灰太狼”玩具6个,购进的“喜洋洋”玩具是“灰太狼”玩具的多少倍?正确的列式是( )
0 132794 132802 132808 132812 132818 132820 132824 132830 132832 132838 132844 132848 132850 132854 132860 132862 132868 132872 132874 132878 132880 132884 132886 132888 132889 132890 132892 132893 132894 132896 132898 132902 132904 132908 132910 132914 132920 132922 132928 132932 132934 132938 132944 132950 132952 132958 132962 132964 132970 132974 132980 132988 199269
| A. | 66×6 | B. | 66-6 | C. | 66÷6 |