When you are younger, you are forced to do math in school. Then you grow up and never use it again and learn to use the calculator on your phone instead. That is until you have kids and you have to help them with their homework and the vicious cycle continues. Why did you have kids again?
This very simple arithmetic question stumped not only the student, but his parents as well. Not because it’s a difficult question, but because of how the teacher marked it. Everyone knows that 3 X 5 = 15 so what is the problem?
The original picture was posted on Imgur on October 2015 and quickly went viral. The Common Core math worksheet asked the students to use the "repeated addition method" to solve the following problem: 3 X 5. Why is this problem marked incorrectly? The student wanted to know. The parents wanted to know. The internet wanted to know.
And while both "5+5+5" and "3+3+3+3+3" arrive at the same answer, the teacher would not give the student the full points. The parents and the student could not understand why the points were deducted. Maybe the kid is a problem child and the teacher just has it out for them?
The teacher did not explain on the paper why one equation was more correct than the other, leaving everyone, including the internet asking why it is wrong. Multiplication means adding a number for a specific amount of times. No matter how they decide to multiply or add up. No matter what order, it should always get you the correct answer if you do it right.