Advanced MathEasy–MediumNumerator after adding fractions with the same denominator
Advanced Math practice question
For x ≠ 0, the sum 2/x + 3/x is equal to k/x, where k is a constant. What is the value of k?
Answer: 5
Same denominator: add the numerators, 2 + 3 = 5, so k = 5.
Common wrong answers
- If you answered 1
- 1 subtracts instead of adding.
- If you answered 6
- 6 multiplies the numerators instead of adding.
- If you answered 2.5
- 2.5 halves the sum, as if the denominators had also been added (2x).
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