共30题用时5分钟

74-34=

75-26=

54-26=

15-15=

74-34=

28+34=

26-0=

28+27=

38+26=

100-76=

35+26=

37+16=

38+16=

100-82=

35-29=

34+19=

39-27=

37-21=

38+29=

26+38=

30-15+14=

37+28=

82-36=

26-18+8=

35+16=

34+38=

19-8+17=

54+28=

28+39=

25-18+6=