I like in the UK so I don't know if this is relevant to you:
You would need an A grade at GCSE in the UK AT MINIMUM
If you're American, that's a fairly high grade at GCSE. You don't need it as high as Biology or Chemistry but it needs to be higher than most other grades.
A
yes, math is going to be needed in every job you ever desire to have
Ninth grade math is just like any other grade level of Math. If you concentrate in class and study at home it will become easy.
addition subtraction multiplication division
By working for it.
''' because they use math to do surgery'''
You have to be in eight grade to do eight grade math. Except if you are very smart.
3rd grade math
You do not "study" basic math. The fundamental properties of numbers in math are memorized through repetition until they become immediate. This should happen around kindergarten or 1st grade.
Saxon Math 8/7 is considered 7th grade math. Hope that helps!
A Level Math grade - D GCSE Math Grade - A* (near full) That should speak for itself
All math is related. In first grade you learn extremely simple math such as subtraction, addition, division and multiplication and in seventh grade you learn more complicated math, such as algebra or trigonometry. Math just gets more and more complicated the higher your grade level but it is still all related to math.