Weak Algebra? (Score 2, Funny)

As an intructor in an undergrad EE course, I have found that students can't survive without a fancier-than-computer calculator. They just whim and complain when I am giving out quizzes that involve additions of simple fractions(eg. calculating equivalent resistance of resistors in parallel). A guy complained he couldn't figure out the answer of 0.25 when he kept getting 1/4. duh!!!