19.计算题,注意运用简便运算.
2.36+25.82+77.64-15.82 | 22.8×98+45.6 |
4.58×25.1+45.8×6.35+0.458×114 | 63÷3.7+11÷3.7 |
41.2×8.1+11×1.25+53.7×1.9 | 4.8×7.8+78×0.52 |
99×86.2+86.2 | 999.9×0.28-0.6666×370 |
23.6-(2.017-0.44)+2.017 | 0.25×0.2×16×1.25 |
18.一个四位小数保留两位小数,“四舍五入”后是13.40,这个数最大是( )
0 164320 164328 164334 164338 164344 164346 164350 164356 164358 164364 164370 164374 164376 164380 164386 164388 164394 164398 164400 164404 164406 164410 164412 164414 164415 164416 164418 164419 164420 164422 164424 164428 164430 164434 164436 164440 164446 164448 164454 164458 164460 164464 164470 164476 164478 164484 164488 164490 164496 164500 164506 164514 199269
A. | 13.40 | B. | 13.4044 | C. | 13.4049 |