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

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