Corretto: 9×2=18, 9×4=36, 9×7=63, 9×5=45, 9×6=54, 9×1=9, 9×8=72, 9×9=81, 9×3=27, 9×10=90, Errato: 9×2=16, 9×4=38, 9×7=52, 9×5=35, 9×6=46, 9×1=1, 9×8=56, 9×9=71, 9×3=26, 9×10=0,

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