I always got 10 wrong in GWD but I could understand it immediately with the solution.... sometime, without a solution, as long as with a right answer, I know how it is if it is carelessness, I am done with GWD23 and no progresses at all same thing always happen like this, terrible... sorry,my computer couldn't type Chinese, but this couldn't stop my complaining..
There is one way to improve your math, Kelly. i.e. do such exercises as jogging or pressing-up. With more oxygen per volume in your brain, you will get more efficient while cracking Math.