they "decrease" the difficulty by increasing the number of steps. They do things like (13x17); multiply 10x10=100 then 3x7=21 then 7x10 then 3x10. 21+100+30+70=221.
Basically the idea is memorize the process that let's you use addition and only a 10x math table to do everything.
On the other hand, you could use the brain to, you know, learn how to do harder things.
I was taught this, I was not taught common core. Multiplication can boil down to addition and a n×10 times table. I realized I could break it down further to a n×5 table with n×10, because of what I learned with factoring.
I was under the impression that common core forced students into lengthy drawings for counting, encouraging close but not exact answers, and doing away with times tables entirely. There's probably more, but this alone is terrible.
Edit; I misunderstood, you're saying they changed the multiplication process entirely. That's pretty bad too.
Will anyone here defend the weird common core math?
Seems stupid to me but maybe it's good?
they "decrease" the difficulty by increasing the number of steps. They do things like (13x17); multiply 10x10=100 then 3x7=21 then 7x10 then 3x10. 21+100+30+70=221.
Basically the idea is memorize the process that let's you use addition and only a 10x math table to do everything.
On the other hand, you could use the brain to, you know, learn how to do harder things.
I was taught this, I was not taught common core. Multiplication can boil down to addition and a n×10 times table. I realized I could break it down further to a n×5 table with n×10, because of what I learned with factoring.
I was under the impression that common core forced students into lengthy drawings for counting, encouraging close but not exact answers, and doing away with times tables entirely. There's probably more, but this alone is terrible.
Edit; I misunderstood, you're saying they changed the multiplication process entirely. That's pretty bad too.