Over aol.com they have a quiz to test your knowledge against that of a 5th grader. One of the math questions is to add fractions. However if you get the answer incorrect, they tell you how to solve the equation. But they go through much more work to get there than necessary.
The equation in question is 3/4 + 1/2 = x
Obviously you get a common denominator of 4 and then figure out the rest. But in the answer description, they don't recognize 4 as being a common denominator, even though 2 goes into it with no problem, since they say 8 is the correct number instead.
Is this why many kids have such difficulty with math in school? Becasue of how the curriculum is being presented?