2.8.4÷(0.2×0.5)
3.0.7÷0.7-0.7
4. 1÷0.2- 1×0.2
5.3×0.2×0.5
6.3-2×0.5
7. 10×(4.2+4.2)
8.2.4÷3+6.4÷ 1.6
9.( 1.6- 1.6)÷ 1.6
10.9.9× 1.02
1 1. 143.7-56.3-43.7
12.0.86× 17.6-0,86×8.6+0.86
13. 1.6÷ 1.25
14.0. 15÷0.25×4
15.30. 1÷(6.07+2.53)×0.7
16.4.87-0.74+0. 13-0.26
17. 14.75÷4÷0.25
18.6÷3.9× 1.3
19. 13.78+24.657+6.78
20.0. 125×﹙8+2.4﹚×25
2 1。 2.02×63
22.2.5×﹙44+4.4﹚
23. 17.3 1-2.44+3.56
24. 102.5-2.4× 12.5
25. 132÷2.5
26. 12-5.76÷4.8
27.6.4×﹙ 12.5×0. 125﹚
28.﹙ 100-0.03+9.97﹚×0.0 1
29.7.4÷ 12.5
30.8×﹙ 12.5+2.5﹚×4
3 1.82.84-﹙ 16.45-7. 16﹚- 18.55
32.36×7.2+7.4×72+ 1 10×2.8
33.4.5÷2.5
34.38.4+28.66+7 1.54+ 1 1.6
34.﹙2.5×7.4-2.5×2.4﹚×0.4
35.0. 175÷0.25×4
36.0.57×0.25×400
37.0.36×99
38. 120×4×0.25×0.7
39.4.56-﹙ 1+0.4﹚×3.2
40.6.4×﹙ 125×0. 125﹚