Multiple choice

What approximate value should come on place of question mark (?) in the following question? $521.422 \times 9.923 + 219.762 \times 70.71 - 81.81 \times 51.26 =?$

  1. 15500

  2. 17800

  3. 16500

  4. 17500

  5. 18500
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Round each number to simplify: 521.422 × 9.923 ≈ 521 × 9.9 ≈ 5158. 219.762 × 70.71 ≈ 220 × 70.7 ≈ 15554. 81.81 × 51.26 ≈ 82 × 51.3 ≈ 4207. Final calculation: 5158 + 15554 - 4207 ≈ 16505. The closest option is 16500 (option C).

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