can mental calculations happen subconsciously or they can get automated.
i am having problem in mental maths , it takes me 10 seconds to calculate mentally ( slower than pen paper) . i dont know how i can make it automated , and make my addition and multiplication superfast.
i use criss cross method but i usually get lagged in between sometimes like - i know tables till 15 but it takes time for me to recall and visualise their addn and subcn , even if no’s are small. so ultimately i am not able to grow . please help me and tell me the proper strategy to begin and spend my tie productively cause i am getting frustated and depressed.