18.一个三角形的面积是60dm2,底长8dm,高是( )dm.
| A. | 3 | B. | 6 | C. | 15 |
16.要使5□2是3的倍数,□里最大填( )
| A. | 5 | B. | 6 | C. | 8 | D. | 9 |
15.把1.2化成分数,正确的是( )
| A. | $\frac{12}{10}$ | B. | $\frac{1}{5}$ | C. | $\frac{6}{5}$ | D. | $\frac{12}{1}$ |
14.下面各数中,最大是( )
| A. | 3.1 | B. | $\frac{10}{3}$ | C. | 3.3 | D. | 3$\frac{2}{5}$ |
13.下面是最简分数的是( )
0 132038 132046 132052 132056 132062 132064 132068 132074 132076 132082 132088 132092 132094 132098 132104 132106 132112 132116 132118 132122 132124 132128 132130 132132 132133 132134 132136 132137 132138 132140 132142 132146 132148 132152 132154 132158 132164 132166 132172 132176 132178 132182 132188 132194 132196 132202 132206 132208 132214 132218 132224 132232 199269
| A. | $\frac{13}{26}$ | B. | $\frac{4}{15}$ | C. | $\frac{14}{21}$ | D. | $\frac{4}{10}$ |