9 += 12 + 5 = 18 16 -=10 14 -= 5
7 += 15 5 += 11 8 +=16 16 -= 9
45 43 25 31 22
2+3= 2+2= 7+0= 5-3=
4+1= 5-4= 3-3= 5+0=
3+1= 6-5= 4+3= 5-5=
5-2= 0+5= 3+3= 1+2=
□○□=□
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