320×20=________; | 100×10=________; | 21×400=________; | 50×80=________; |
910÷70=________; | 300÷60=________; | 480÷20=________; | 800÷20=________. |
320×20=________; | 100×10=________; | 21×400=________; | 50×80=________; |
910÷70=________; | 300÷60=________; | 480÷20=________; | 800÷20=________. |