24 - [2.4 - {0.24 * 2 - (0.024 - ?)}] = 22.0584
Correct answer: A. 0.0024
- A. 0.0024
- B. 0.024
- C. 0.24
- D. 0.00024
Explanation
Let the missing value be x. Inside the braces, 0.24 x 2 - (0.024 - x) = 0.456 + x, so the whole expression becomes 24 - (1.944 - x) = 22.056 + x; equating this to 22.0584 gives x = 0.0024, option a. The likely mistake is choosing b, 0.024, by losing a zero in the decimal subtraction.
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