13．脱式计算（怎样简便就怎样算）
| 9.36-2.54-1.46 | 256×35-35×57+35 | 48.7-（4.9+8.7） |
| 202×45 | 24×97+72 | 36×111+888×8 |
12．直接写得数．
0 157552 157560 157566 157570 157576 157578 157582 157588 157590 157596 157602 157606 157608 157612 157618 157620 157626 157630 157632 157636 157638 157642 157644 157646 157647 157648 157650 157651 157652 157654 157656 157660 157662 157666 157668 157672 157678 157680 157686 157690 157692 157696 157702 157708 157710 157716 157720 157722 157728 157732 157738 157746 199269
| 0.47+0.28= | 250×8= | 2-1.45= | 3.64+0.9= |
| 125×7×8= | 5.8+0.12= | 101×48= | 435-99= |
| 4.7+3.8+5.3+6.2= | 44×25= | 5.34×100= | 6÷1000= |