21345 * 45 = 4270 * ?
Correct answer: C. 225
- A. 215
- B. 235
- C. 225
- D. 255
Explanation
Let the unknown be x and rearrange: x = (21345 x 45) / 4270. Since 21345 / 4270 is approximately 4.9988, x is approximately 4.9988 x 45 = 224.95, which rounds to 225, option c. The likely mistake is choosing a, 215, by using an inaccurate estimate for the quotient.
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