2.把16+40=56,56÷8=7写成一个算式是( )
| A. | 16+40÷8 | B. | (16+40)÷8 | C. | 16+(40÷8) |
1.要使10□×3的积中间有0,□里最大填( )
| A. | 3 | B. | 2 | C. | 4 |
16.
0 134632 134640 134646 134650 134656 134658 134662 134668 134670 134676 134682 134686 134688 134692 134698 134700 134706 134710 134712 134716 134718 134722 134724 134726 134727 134728 134730 134731 134732 134734 134736 134740 134742 134746 134748 134752 134758 134760 134766 134770 134772 134776 134782 134788 134790 134796 134800 134802 134808 134812 134818 134826 199269
| 口算. 30×50= | 25×4= | 11×40= | 906÷3= |
| 400×0= | 1000÷2= | 13×30= | 100-21= |
| 480÷6= | 0÷380= | 68÷4= | 49+76= |