13是一个游戏

1: 3 × 5 - 4 + 13

2: (3 × 5) - 4 + 13

3: (3 × 5 - 4) + 13

4: ((3 × 5) - 4) + 13

5: 3 × 5 -(4 - 13)

6: (3 × 5) - (4 - 13)

7: 3 × 5 + 13 - 4

8: (3 × 5) + 13 - 4

9: (3 × 5 + 13) - 4

10: ((3 × 5) + 13) - 4

11: 3 × 5 +(13 - 4)

12: (3 × 5) + (13 - 4)

13: 5 × 3 - 4 + 13

14: (5 × 3) - 4 + 13

15: (5 × 3 - 4) + 13

16: ((5 × 3) - 4) + 13

17: 5 × 3 -(4 - 13)

18: (5 × 3) - (4 - 13)

19: 5 × 3 + 13 - 4

20: (5 × 3) + 13 - 4

21: (5 × 3 + 13) - 4

22: ((5 × 3) + 13) - 4

23: 5 × 3 +(13 - 4)

24: (5 × 3) + (13 - 4)

25: (5 + 13) ÷ 3 × 4

26: ((5 + 13) ÷ 3) × 4

27: (5 + 13) ÷ (3 ÷ 4)

28: (5 + 13) × 4 ÷ 3

29: ((5 + 13) × 4) ÷ 3

30: (5 + 13) × (4 ÷ 3)

31: 4 ÷ 3 ×(5 + 13)

32: (4 ÷ 3) × (5 + 13)

33: 4 ÷ (3 ÷ (5 + 13))

34: 4 ÷ 3 ×(13 + 5)

35: (4 ÷ 3) × (13 + 5)

36: 4 ÷ (3 ÷ (13 + 5))

37: (4 × (5 + 13)) ÷ 3

38: 4 × (5 + 13) ÷ 3

39: 4 × ((5 + 13) ÷ 3)

40: (4 × (13 + 5)) ÷ 3

41: 4 × (13 + 5) ÷ 3

42: 4 × ((13 + 5) ÷ 3)

43: 13 + 3 × 5 - 4

44: (13 + 3 × 5) - 4

45: (13 + (3 × 5)) - 4

46: 13 + (3 × 5) - 4

47: 13 + (3 × 5 - 4)

48: 13 + ((3 × 5) - 4)

49: 13 + 5 × 3 - 4

50: (13 + 5 × 3) - 4

51: (13 + (5 × 3)) - 4

52: 13 + (5 × 3) - 4

53: 13 + (5 × 3 - 4)

54: 13 + ((5 × 3) - 4)

55: (13 + 5) ÷ 3 × 4

56: ((13 + 5) ÷ 3) × 4

57: (13 + 5) ÷ (3 ÷ 4)

58: (13 + 5) × 4 ÷ 3

59: ((13 + 5) × 4) ÷ 3

60: (13 + 5) × (4 ÷ 3)

61: 13 - 4 + 3 × 5

62: (13 - 4) + 3 × 5

63: 13 - 4 +(3 × 5)

64: (13 - 4) + (3 × 5)

65: 13 - (4 - 3 × 5)

66: 13 - (4 - (3 × 5))

67: 13 - 4 + 5 × 3

68: (13 - 4) + 5 × 3

69: 13 - 4 +(5 × 3)

70: (13 - 4) + (5 × 3)

71: 13 - (4 - 5 × 3)

72: 13 - (4 - (5 × 3))