Igaz: 2+6=8, 3+4=7, 8+2=10, 6+10=16, 7+4+3=14, 19-7=12, 20-4-6=10, 17-3-4=10, 17-2-2=13, 20-6=14, 15+3=18, 14-2=12, Hibás: 2+7=8, 3+7=9, 10+6=15, 6+10=15, 11+6=18, 6+8+2=15, 19-13=7, 20-5-5=9, 18-3-5=8, 14-4-3=8, 11+4=14, 15+2=16,

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