共30题用时5分钟

36+45=

28-19-9=

51-18=

39-27=

3+14+7=

52-16=

61-15=

82-36=

25-7-13=

56-38=

37+48=

26-17-5=

3+29=

51-18=

15+3+10=

46+14=

82-34=

12+15+2=

75-46=

60-25=

26-18-8=

54-26=

80-9=

19-8+11=

38+27=

9+34=

30-8-16=

62-38=

18+26=

30-13-8=