Răspuns:
3 × 27 = 3 × ( 3 × 9 ) = ( 3 × 3 ) × 9 = 9 × 9 = 81
5 × 14 = 5 × ( 2 × 7 ) = ( 5 × 2 ) × 7 = 10 × 7 = 70
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