9.两个不同质数的最小公倍数是( )
| A. | 较大的数 | B. | 较小的数 | C. | 它们的乘积 | D. | 不确定 |
8.$\frac{2}{11}$的分子加上10,要使分数大小不变,分母应加上( )
| A. | 6 | B. | 12 | C. | 55 | D. | 66 |
7.大于$\frac{1}{8}$而小于$\frac{7}{8}$的真分数有( )个.
0 126866 126874 126880 126884 126890 126892 126896 126902 126904 126910 126916 126920 126922 126926 126932 126934 126940 126944 126946 126950 126952 126956 126958 126960 126961 126962 126964 126965 126966 126968 126970 126974 126976 126980 126982 126986 126992 126994 127000 127004 127006 127010 127016 127022 127024 127030 127034 127036 127042 127046 127052 127060 199269
| A. | 5 | B. | 2 | C. | 3 | D. | 无数 |