Respuesta:
a) 12 × 10 × 2 = 12 × 10 × 2
(12 × 10) × 2 = 12 × (10 × 2)
120 x 2 = 12 x 20
240 = 240
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Respuesta:
a) 12 × 10 × 2 = 12 × 10 × 2
(12 × 10) × 2 = 12 × (10 × 2)
120 x 2 = 12 x 20
240 = 240