加减乘除
1+2= ___________________ 3+4= ___________________ 10+5= ___________________ 12+8= ___________________ 23+9= ___________________ 44+33= ___________________ 50+40= ___________________ 68+22= ___________________ 70+28= ___________________ 80+20= ___________________ 2-1= ___________________ 12-6= ___________________ 35-23= ___________________ 56-42=___________________ 88-66=___________________ 76-31=___________________ 99-54=___________________ 109-23=___________________ 267-87= ___________________ 355-123= ___________________
2×3= ___________________ 3×4= ___________________ 7×9= ___________________ 12×23= ___________________ 23×34= ___________________ 34×10= ___________________ 26×8= ___________________ 33×22= ___________________ 55×22= ___________________ 24×5= ___________________ 2÷1= ___________________ 6÷3= ___________________ 15÷5= ___________________ 66÷22= ___________________ 200÷8= ___________________ 100÷25= ___________________ 108÷4= ___________________ 927÷9= ___________________ 1000÷8= ___________________ 2000÷40= __________________