2.直接写数对又快!
0 157434 157442 157448 157452 157458 157460 157464 157470 157472 157478 157484 157488 157490 157494 157500 157502 157508 157512 157514 157518 157520 157524 157526 157528 157529 157530 157532 157533 157534 157536 157538 157542 157544 157548 157550 157554 157560 157562 157568 157572 157574 157578 157584 157590 157592 157598 157602 157604 157610 157614 157620 157628 199269
2.64+3.6= | $\frac{1}{2}$+$\frac{1}{5}$= | 2.4×50= | 3500÷70= |
2050-298= | 6.3×10%= | 2+7÷9= | 0.3÷3%= |