i need math heeeelllllp!?

i have to take a trades math assessment tomorrow. i hated math in high school so i decided to take accounting after grade 9 to get by. it’s been 10 years since i have been in school so i have forgotten everything!!!!

does anyone know of any (free) grade10 math study tools online? stuff like, adding multiplying fraction, figuring out percentages, simple algebra, simple geometry ( figuring out circumferences etc).

it’s got to be made for dummies! easy explanations! i don’t have time to go out and buy a book because it’s first thing in the morning…. *cringe*

pls help