7.
0 158259 158267 158273 158277 158283 158285 158289 158295 158297 158303 158309 158313 158315 158319 158325 158327 158333 158337 158339 158343 158345 158349 158351 158353 158354 158355 158357 158358 158359 158361 158363 158367 158369 158373 158375 158379 158385 158387 158393 158397 158399 158403 158409 158415 158417 158423 158427 158429 158435 158439 158445 158453 199269
计算下面各题. (1)$\frac{5}{6}-\frac{1}{4}+\frac{1}{3}$ | (2)$\frac{1}{5}+\frac{7}{15}+\frac{4}{15}$ | (3)$\frac{7}{10}-(\frac{3}{4}-\frac{2}{5})$ | (4)$\frac{13}{15}-(\frac{1}{3}+\frac{2}{5})$ |
(5)1-$\frac{3}{10}$-$\frac{2}{5}$ | (6)$\frac{23}{24}-\frac{1}{6}-\frac{3}{8}$ | (7)$\frac{5}{6}-\frac{7}{10}+\frac{1}{10}$ | (8)$\frac{9}{14}-(\frac{3}{14}+\frac{2}{5})$. |