15.直接写出得数.
| 25÷25= | 3.25×1000= | 14×5÷14×5= | 0÷50+50= |
| 100÷4÷25= | 125×8= | 240÷16= | 9×99+9= |
| 25×4= | 24×5= | 200-155-45= | 36+12+63+1= |
14.与25×120的积不相等的算式是( )??
| A. | 250×(10+2) | B. | 25×40×3 | C. | 25×4+30 | D. | 25×20×6? |
13.算式3.27×25×4=3.27×(25×4)运用了( )
0 135840 135848 135854 135858 135864 135866 135870 135876 135878 135884 135890 135894 135896 135900 135906 135908 135914 135918 135920 135924 135926 135930 135932 135934 135935 135936 135938 135939 135940 135942 135944 135948 135950 135954 135956 135960 135966 135968 135974 135978 135980 135984 135990 135996 135998 136004 136008 136010 136016 136020 136026 136034 199269
| A. | 乘法交换律 | B. | 乘法结合律 | ||
| C. | 乘法分配律 | D. | 乘法交换律和结合律 |