共30题 用时5分钟

25+42=

37-32=

61+32=

52-20=

0+58=

17+70=

59-22=

26-1=

89-46=

35+43=

0+52=

89-78=

81-11=

55-21=

71-57=

93-52=

80-22=

74-21=

11+81=

29+41=

51-6=

99-31=

21-0=

67-4=

3+51=

90+7=

37+21=

56-45=

58-22=

23+24=