What number added to 47 equals 75?
- 75
- 47
- 25
- 28 (correct answer)
Explanation: Since 47 plus 28 equals 75, 28 is the missing number. Choice A, 75, is the total itself, not the missing addend. Choice B, 47, is the number already given in the problem. Choice C, 25, is close to the answer but does not make the equation true.