Corect, 8+4=12, 9+3=12, 7+6=13, 8+8=16, 9+6=15, 7+7=14, 9+9=18, 9+8=17, 6+5=11, 6+6=12, 7+5=12, 8+5=13, 7+8=15, 9+7=16, 9+2=11, 9+4=13, 8+3=11, 8+6=14, 7+4=11, 9+5=14, Incorect, 8+4=13, 9+3=11, 7+6=12, 8+8=15, 9+6=14, 7+7=15, 9+9=17, 9+8=16, 6+5=12, 6+6=11, 7+5=13, 8+5=14, 7+8=14, 9+7=15, 9+2=12, 9+4=12, 8+3=12, 8+6=13, 7+4=10, 9+5=13.

Adunarea numerelor naturale în concentrul 0-20, cu trecere peste ordin

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