Equivalent fractions

Sometimes, students just miss the difference between equivalent fractions and the square of them:

(porque means "because" in Spanish)

Just so you know, I'm maknig fun of students here, but I'm not picking on little, defenseless toddlers. Every entry in this blog comes from secondary students' exams. And they are all 13 or older. Anyway, you can still call me "mean bastard" if you want, but that won't stop you from laughing at the errors.

Sum of powers

To begin this new era of mathematical incoherence, I present you with a classic: sum of powers


FYI, this guy got the best mark from his class in that test: 7.5/10 Sweet, sweet irony.

Comeback

Originally, this blog was just an attempt to make some money online, and practice my english skills. Well, of course it also intended to entertain you with some of the best mistakes I have found on secondary school math tests.

But all in all, when the summer holidays were over, I kind of lost the interest on the blog and abandoned it. However, these last days, while I helped correct some tests, I was so amazed at the magnitude of the idiocies committed that I didn't know whether o laught or cry. Guess I'll just post them and let you decide!

So, here I am, back, and for good. Well, maybe not for good, but at least for a week or two.

Substraction

I guess that that 6 is the result of doing 8-14, and then sticking the - sign up your butt, but I'm not sure really. I mean, is one supposed to pay attention to + and - signs?

Anyway, my favorite part of this image is the two-story number in the third line:
4
10

What in hell is it supposed to be? It's clearly not an exponent, because it's ON TOP of the 10, but then again, what IS it? I left that question to you boys.

Number Line

If after the zero we write 1, 2, 3, 4, it is only logical to write the complete number line like this, right?


Now, I really don't know what bewilders me the most: the way in which this student draw the number the ifirst time, or the fact that the second time he did it, he wasn't disturbed by the fact that he had to completely ignore -5, -6 and -7 to make the new line.

Advanced equation solving II

OK, let's go step by step:
1: How in earth can -4 -(-2) = -6 ??? Look! Even the minuses with the parenthesis look like a + sign! -4 + 2 = -2!!!!

2: This is probably one of my favorite errors. He decided to treat the numerator of the fraction as if it was completely alone!!! And he didn't stop there, either. He took the denominator and decided that it would be the numerator from there on. Speechless.

3: If anyone knows how a fraction whose numerator is smaller than its denominator , like 3/6, becomes greater than 1, please, let me know. I beg you.

Inequality

I could give it a try and attempt to explain what this student tried to do... but I don't really think I could.


Again, this fella decided that the > sign was bothering him, and eliminated it. It's becoming a trend!