This elementary school math problem has parents stumped. Not because they can't solve it, but because it was marked wrong, even though the final answer is correct.
An image shows a Common Core math worksheet asking students to "use the repeated addition method" to solve an equation: 5 x 3. The student wrote 15 as the final answer, but was penalized for writing "5 + 5 + 5" instead of "3 + 3 + 3 + 3 + 3."
The student clearly had the correct answer, and used addition to show his or her work, but points were still deducted.
For the second question on the worksheet, the student again wrote the right answer and showed his or work, but points were taken off.
Parents of today's generation of elementary school students grew up learning a much different—often less complicated—style of mathematics. Problems like these leave them scratching their heads, and wondering about the importance of these minor details.