共30题用时5分钟

77-34+55=

25-9-12=

73-28=

60-34+35=

23-14-9=

54-28=

99-88+77=

11+16-9=

23-10-5=

77-64+22=

12+18-15=

25-16-7=

55+38-15=

30-16-9=

28-2-19=

92-6+11=

30-11-13=

26-7-18=

65+15-47=

12+3+14=

30-16-14=

77-38+42=

13+12+5=

30-11-13=

54-41+36=

16+12-19=

26-5-16=

42-37+54=

18+11-13=

28-19-3=