共30题 用时5分钟

37-6=

77+0=

87-4=

56+3=

14-3=

38-0=

49-5=

24+0=

67+3=

66-0=

14-2=

50+8=

45-0=

21+7=

92-2=

63+7=

33-1=

17-5=

53-0=

88-2=

77-3=

53+4=

24+4=

68-0=

37-1=

79-6=

41+1=

70+9=

98-8=

55-1=