计算练习
11-8= 13-4= 17-9=
14-6= 12-7= 16-7=
15-8= 13-7= 12-4=
17-8= 14-5= 13-5=
11-2= 13-8= 11-9=
17-9= 12-3= 15-6=
9+6 = 15-9= 6+5 =
14-8= 53-6= 73-60=
12-5= 24+7= 40-6=
60+37= 56+6= 47-8=
54-4= 43+9= 57+3=
33-7= 44-6= 35-8=
5+5 = 37+8= 45+8=
93-40= 46+3= 63-7=
18+4= 45-30= 27+9=
51+6= 12+8= 81-70=
72-9= 75-3= 36+9=
70+28= 21+7= 43-6=
55-5= 43-20= 37-9=
52+4= 47+7= 74-50=
27+8= 61+5= 61-5=