2.( 1- 1/2)( 1- 1/3)( 1- 1/4)......( 1- 1/ 100)

3.8+2-8+2

4.25*4/25*4

5.7.26-(5.26- 1.5)

6.286+ 198

7.3 14-202

8.526+30 1

9.223-99

10.6.25+3.85-2. 125+3.875

1 1.9-2456*2 1

12.0.5/ 1 1.5-4*2.75

13. 1/2×3/5

14.3.375+5.75+2.25+6.625

15. 100 1-9036÷ 18

16.3.8×5.25+ 14.5

17.2. 1*4.3+5.7*2. 1

18.30× 1/3

19. 102*45-328

20.2/3× 12

2 1.2.8*3. 1+ 17.6/8

22.3/5×5/6

23.(50- 12.5)/2.5

24.2/5× 1/3

25.6 1 10*47+639

26. 1/2- 1/6

27.3.5*2.7-52.2/ 18

28. 1/7× 1/5

29.3.375*0.97+0.97*6.625

30.25×4/5

3 1.6.54+2.4+3.46+0.6

32.5/6- 1/2

33.95.6* 1.8+95.6*8.2

34. 1/2× 1/5

35.600-420/ 12

36.344/3.6-5.4*0.25

37. 16/2+30/2+90/6

38.300 1- 1998.

39.5000- 105*34

40.0. 15/0.25+0.75* 1.2

4 1.( 1/2+ 1/3+ 1/4)*0.24

42.(25+4)*4

43.300-4263/2 1

44.0.8 1/0.25+5.96

45.403÷ 13×27

46. 1.5×4.2-0.75÷0.25

47.3.27×4 +3.27×5.7

48.( 1.2+ 1.8)×4.5 1025-768÷32

49.0.25×80-0.45÷0.9

50. 1025-768÷32