Multiple choice

Find the approximate result of the following expression (in whole numbers): 49.6 × 10.2 - 7.1 × 29.7 - 5.1 × 20.1

  1. 390

  2. 290

  3. 209

  4. 190
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D Correct answer
Explanation

49.6 * 10.2 is approx 50 * 10 = 500. 7.1 * 29.7 is approx 7 * 30 = 210. 5.1 * 20.1 is approx 5 * 20 = 100. 500 - 210 - 100 = 190.

AI explanation

Approximate the given values to their nearest whole numbers to form the expression 50 x 10 - 7 x 30 - 5 x 20. Following the order of operations, first calculate the multiplication products to get 500 - 210 - 100. Subtracting these values gives an approximate result of 190.

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