解:911×4等于( 3644 ) ∵已知需求出911×4等于多少 A × (B + C)= A × B + A × C ∴911 × 4 = (900 + 11)× 4 = 900 × 4 + 11 × 4 = 3600 + 44 = 3644 答:911×4等于3644