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□○□=□(岁)
30+55= 76+3= 33+50= 2+67= 5+42=
50+20= 40+46= 7+22= 65+30= 31+8=
41+7= 66+30= 24+50= 20+67= 50+47=
6+43= 34+20= 4+74= 30+44= 8+71=
48-4= 68-3= 45-2= 57-4=
48-40= 86-3= 54-2= 75-4=
84-40= 86-30= 54-20= 75-40=
8+9= 6+7= 4+7= 5+8=
17-8= 13-7= 11-7= 13-8=
45-8= 66-8= 82-5= 30-7=
34-9= 52-4= 60-4= 23-6=
51-6= 87-9= 45-9= 90-2=
73-9= 26-7= 34-5= 41-3=
36+3= 4+34= 13+5= 7+22=
36+5= 6+34= 15+5= 7+24=
36+7= 8+34= 18+5= 7+26
45-3= 44-8= 60-5= 32-7=
45-5= 64-8= 60-7= 42-7=
45-7= 84-8= 60-9= 52-7=
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