6 Plusaufgaben am Zwanzigerfeld 1 2 3 3 + 3 = 4 + 4 = + = + = 3 + 2 = + = + = + = 5 + 2 = 6 + 2 = 7 + 2 = 6 + 2 = 7 + 2 = 8 + 2 = 4 + 3 = 5 + 3 = 6 + 3 = 1 + 5 = 2 + 5 = 3 + 5 = Nur zu Prüfzwecken – Eigentum des Verlags öbv
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