15.23×35的积( )35×23的积.
A. | 大于 | B. | 小于 | C. | 等于 | D. | 不一定 |
7.口算.
0 157703 157711 157717 157721 157727 157729 157733 157739 157741 157747 157753 157757 157759 157763 157769 157771 157777 157781 157783 157787 157789 157793 157795 157797 157798 157799 157801 157802 157803 157805 157807 157811 157813 157817 157819 157823 157829 157831 157837 157841 157843 157847 157853 157859 157861 157867 157871 157873 157879 157883 157889 157897 199269
12×50= | 7500÷300= | 25×4= | 3×7+7×7= | 0÷25= |
58×0+987= | 24-8×2= | 125×8= | 35+24-12= | 3×6÷9= |