1.
用简便方法计算 $\frac{5}{9}$×$\frac{3}{4}$+$\frac{5}{9}$×$\frac{1}{4}$ | $\frac{5}{4}$×$\frac{1}{8}$×16 | $15×\frac{6}{7}-\frac{6}{7}$ |
17×$\frac{9}{16}$ | ( $\frac{3}{4}$+$\frac{5}{8}$)×32 | $(\frac{3}{16}×30)×\frac{8}{15}$. |
20.甲×$\frac{1}{4}$=乙×$\frac{1}{3}$,甲、乙两个数中( )
0 160239 160247 160253 160257 160263 160265 160269 160275 160277 160283 160289 160293 160295 160299 160305 160307 160313 160317 160319 160323 160325 160329 160331 160333 160334 160335 160337 160338 160339 160341 160343 160347 160349 160353 160355 160359 160365 160367 160373 160377 160379 160383 160389 160395 160397 160403 160407 160409 160415 160419 160425 160433 199269
A. | 甲<乙 | B. | 甲>乙 | C. | 甲=乙 |