The way to improve the speed of basic math caculating, probably you have to remember the addtion and substraction tables

My son only remember addtion table and times table, substraction and division just oppsite.

I think there is not much tricks to improve it, she surely understand what minus mean, she just need remember the fact and practice over and over again, even it is bit boring.


Although my son get very good memory of numbers, after a while he still forget and have to pick it up again.