2．直接写出得数．
0 157571 157579 157585 157589 157595 157597 157601 157607 157609 157615 157621 157625 157627 157631 157637 157639 157645 157649 157651 157655 157657 157661 157663 157665 157666 157667 157669 157670 157671 157673 157675 157679 157681 157685 157687 157691 157697 157699 157705 157709 157711 157715 157721 157727 157729 157735 157739 157741 157747 157751 157757 157765 199269
| 12×40= | 9.4-0.8= | 2.5+0.7= | 20×50= |
| 6.4-3= | 0÷68= | 1000×0= | 540÷6= |
| 420÷6= | 816÷4= | 30×20= | 50×40= |
| 4.8﹢2.1= | 12-1.2= | 2.1+3.5= | 7.2-0.7= |
