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20: 15+5, 16+4, 11+9, 17+3, 12+8, 10 + 10, 19: 11+8, 12+7, 14+5, 16+3, 20 - 1, 18: 19 - 1, 20 - 2, 12 + 6, 11 + 7, 9 +9 ,

Zbrajanje i oduzimanje do 20

by Vuksan

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