13-7=
11-3=
43+24=
75-13=
47-40=
20+53=
78-38=
7+38=
53-7=
45-5=
( ) ( ) ( ) ( )
40+8= 70+6= 60+8= 13-6= 58-8=
17-9= 12-5= 35-5= 15-7= 13-6=
17-6+6= 22-2+3= 13-0+0= 5+6-8= 44-4=
12-7= 14-6= 15-9= 18-9= 14+4=
11+8= 16-5= 17-9= 13-6= 15-5=
5+13= 15-7= 11-4= 9+4= 12-4=
19+2= 28+5= 37+7= 46+9= 57+3=
3+88= 9+73= 8+65= 7+57= 9+47=
26+5= 37+6= 48+7= 59+8= 64+6=
2+89= 4+78= 6+67= 5+59= 2+38=
12-=5
-6=20
+60=65
90+=99
-5=70
+8=14