According to your answer, it looks like you could use some help with the Metric System. This is taught in Volume 4 of the Learn Math Fast System. You'll learn some cool tricks to make learning the metric system easy.
RESULTS: The End of the 8th Grade Level, however, the Learn Math Fast System is for all ages. Not all curricula teach the Metric System at this point. Volume 4 covers 3rd - 8th grade geometry and the metric system, but there is no mention of grade level within the books.