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There actually is a reason. It is to make sure that kids have mastery of fundamental skills that they will need in the future. If it takes you a long to subtrac

There actually is a reason. It is to make sure that kids have mastery of fundamental skills that they will need in the future. If it takes you a long to subtract, for example, it will take you an impractically long to do long division, and eventually you will take so long with more complex concepts that you won't be able to learn effectively. Additionally, you also want a fair number of problems in any given test to reduce the variance in the grades, and you want the student to be able to finish a significant number exercises that can truly cover the breadth of the content to learn, hopefully with more than one approach as well. If a student takes 2h to solve a problem there is no way they will be able to complete enough of a problem set. Of course, there are outliers. But personally, especially given my shorter attention span, the ability to do math correctly and quickly was absolutely crucial, and I wouldn't have been able to pass otherwise.

mph10 3y ago
Subtraction is not necessary for division. This is a specific example, and the general point is that there a multiple ways of doing things. If a child can avoid 1 step and skip straight to the result more efficiently, that is a valid way of solving a problem.
- sudosysgen 3y ago
  Substraction is necessary for long division. Elementary schools force you to learn long division because later when you learn algebra, you need long division to divide polynomials, for example. You also will need substraction to do Gaussian elimination, etc... Many school systems make difference between the ability to solve a problem, and the ability to solve a problem a certain way. Sometimes the first is all that's asked, but when that way of doing things is necessary later, then the second is asked of you. The point is that you want to prepare the child for what they will need in the future. Sure, perhaps you are doubly exceptional and will be able to adapt on the fly in the future, but you can't design a school system around extremely uncommon students. I say this as another 2E student that had very similar issues. There is no good way of fixing it except maybe by giving special accommodations to these students. I repeatedly failed exams exactly because I would skip steps this way, but there is no sense fundamentally changing the entire school system and hurting the majority for that.

mph10 3y ago

Subtraction is not necessary for division. This is a specific example, and the general point is that there a multiple ways of doing things. If a child can avoid 1 step and skip straight to the result more efficiently, that is a valid way of solving a problem.

sudosysgen 3y ago
Substraction is necessary for long division. Elementary schools force you to learn long division because later when you learn algebra, you need long division to divide polynomials, for example. You also will need substraction to do Gaussian elimination, etc... Many school systems make difference between the ability to solve a problem, and the ability to solve a problem a certain way. Sometimes the first is all that's asked, but when that way of doing things is necessary later, then the second is asked of you. The point is that you want to prepare the child for what they will need in the future. Sure, perhaps you are doubly exceptional and will be able to adapt on the fly in the future, but you can't design a school system around extremely uncommon students. I say this as another 2E student that had very similar issues. There is no good way of fixing it except maybe by giving special accommodations to these students. I repeatedly failed exams exactly because I would skip steps this way, but there is no sense fundamentally changing the entire school system and hurting the majority for that.