共30题 用时5分钟

82-8=

71-4=

65-7=

82-7=

25-6=

41-4=

87-8=

43-9=

42-9=

52-7=

88-9=

84-9=

75-6=

96-8=

86-8=

34-7=

42-9=

81-2=

94-8=

93-4=

60-7=

75-6=

62-6=

10-9=

73-7=

90-7=

90-8=

95-8=

45-8=

14-6=