4．直接写上得数．
0 161596 161604 161610 161614 161620 161622 161626 161632 161634 161640 161646 161650 161652 161656 161662 161664 161670 161674 161676 161680 161682 161686 161688 161690 161691 161692 161694 161695 161696 161698 161700 161704 161706 161710 161712 161716 161722 161724 161730 161734 161736 161740 161746 161752 161754 161760 161764 161766 161772 161776 161782 161790 199269
| 0.8×0.4= | 3.6÷0.6= | 1.3×7= | 2.5×0.9×4= | 4.2÷2= |
| 1.02×5= | 15÷0.05= | 2.8×0.5×2= | 3.2×12-2×3.2= | 6.7×5+33×0.5= |