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Class 8 · Mathematics · Ganita Prakash - Part I

6. We Distribute, Yet Things Multiply

Try question 1

By the distributive property, 7 × (10 + 3) equals

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Answer and explanation

Answer: B. 7 × 10 + 7 × 3

a(b + c) = ab + ac, so 70 + 21 = 91.

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Try question 2

23 × 101 equals

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Answer and explanation

Answer: A. 2323

23 × (100 + 1) = 2300 + 23 = 2323.

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Try question 3

Using (a + b)², 21² equals

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Answer and explanation

Answer: B. 441

(20 + 1)² = 400 + 40 + 1 = 441.

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All 5 questions of this chapter, with explanations →