16.把下面的小数化成分数,分数化成小数.(除不尽的保留两位数)
| 0.8= | 1.4= | 0.125= | $\frac{7}{20}$= | $\frac{5}{8}$= | $\frac{5}{11}$= |
14.将下列各组分数先通分,然后比较大小.
| $\frac{3}{4}$和$\frac{7}{12}$ | $\frac{7}{12}$和$\frac{11}{15}$ | $\frac{4}{5}$和$\frac{5}{6}$ | $\frac{5}{12}$和$\frac{7}{8}$ |
13.约分.
| $\frac{15}{25}$ | $\frac{24}{36}$ | $\frac{26}{13}$ | $\frac{100}{75}$ |
12.
图上□里的数是( )
| A. | $\frac{7}{10}$ | B. | $\frac{2}{5}$ | C. | 1$\frac{3}{5}$ | D. | $\frac{7}{5}$ |
11.下面的分数中只有( )是最简分数.
0 156398 156406 156412 156416 156422 156424 156428 156434 156436 156442 156448 156452 156454 156458 156464 156466 156472 156476 156478 156482 156484 156488 156490 156492 156493 156494 156496 156497 156498 156500 156502 156506 156508 156512 156514 156518 156524 156526 156532 156536 156538 156542 156548 156554 156556 156562 156566 156568 156574 156578 156584 156592 199269
| A. | $\frac{21}{35}$ | B. | $\frac{3}{51}$ | C. | $\frac{9}{10}$ | D. | $\frac{93}{111}$ |