11．简便计算．
0 160256 160264 160270 160274 160280 160282 160286 160292 160294 160300 160306 160310 160312 160316 160322 160324 160330 160334 160336 160340 160342 160346 160348 160350 160351 160352 160354 160355 160356 160358 160360 160364 160366 160370 160372 160376 160382 160384 160390 160394 160396 160400 160406 160412 160414 160420 160424 160426 160432 160436 160442 160450 199269
| 2.98×1.25×8 | 28×0.25 | 3.4×0.78+6.6×0.78 |
| 5.96×99 | 0.87×99+0.87 | 101×0.45 |
