Răspuns:
41-2= 39
39+2=41
65-7=58
58+7=65
86-8=78
78+8=86
74-5=69
69+5=74
32-5=27
27+5=32
86-7=79
79+7=86
48-9=39
39+9=48
53-6=47
47+6=53