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Find the product using suitable properties.i) 205 × 1989 ii) 1991 × 1005 |
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Answer» i) 205 × 1989 = (200 + 5) × 1989 (Distributive property of multiplication over addition) = (200 × 1989) + (5 × 1989) = 397800 + 9945 = 407745 ii) 1991 × 1005 = 1991 × (1000 + 5) Distributive property of multiplication over addition. = (1991 × 1000)+ (1991 × 5) = 1991000 + 9955 = 2000955 |
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