| 450-140= |
25÷7= |
900+238= |
600-9×8= |
| 90-7×5= |
26+30-28= |
48÷（2+4）= |
780-772= |
| 26+24= |
80-30= |
78-26= |
-= |
| (++) × 24= |
0.25×2.69×4= |
10-2.87-7.13= |
÷24= |
| 3÷= |
0.87-0.49 |
4.9×0.7= |
÷= |
| ÷= |
÷= |
×= |
2+= |
| （25+4）×4= |
12.37-3.25-6.75= |
3/14×6= |
0.51÷17= |
| 14-7.4= |
5.2÷1.3= |
25×12= |
÷= |
| ÷= |
2.5-2= |
36-29= |
120÷4= |
| 300+25= |
630-30= |
4×50= |
15.9+10.8= |
| 26×13= |
24÷4+56÷4= |
8-2.5= |
12×2.5= |
| 2吨50千克=______吨． | |
