13．
| 能简算的要简算 1.25×32×2.5 | 101×0.52 | 1.25×（8+0.8） |
| 4.3×6.8+3.2×4.3 | 0.6×（5-0.68）÷1.2 | 3.6÷（1.2×0.5）×5 |
| 4.5÷1.25÷0.8． |
11．
| 直接写出得数 7.2+2.8= | 0.96÷0.3= | 9.9÷99= |
| 1.2×0.25= | 8.4÷0.42= | 0.5×1.6×0= |
| 0.25×44= | 1÷0.01= | 9-0.22= |
| 4.2÷0.14= | 10÷0.4= | 4.8+0.3= |
| 3.6÷0.04= | 0.9÷0.45= | 0.04÷1= |
| 10÷0.4= | 0.1×0.1×0.1= | 0.2×0.25÷0.2×0.5= |
| 15÷1.5+15= | 2.4÷4+5.6÷4= |
9．
0 162438 162446 162452 162456 162462 162464 162468 162474 162476 162482 162488 162492 162494 162498 162504 162506 162512 162516 162518 162522 162524 162528 162530 162532 162533 162534 162536 162537 162538 162540 162542 162546 162548 162552 162554 162558 162564 162566 162572 162576 162578 162582 162588 162594 162596 162602 162606 162608 162614 162618 162624 162632 199269
| 直接写出得数． 0.5×8= | 3.6×0.4= | 39.68×0= | 47.6×1= |
| 4÷0.5= | 12÷0.06= | 12÷1.2= | 0.3÷3= |
| 3.2×6+3.2×4= | 2.5×4×0.36= | 0.2+0.8×0.5= |