the option of memory keys is not found in the claculator inbuilt. like MC,MR,M+,M-. i have tried several options but could not ascertain those keys.this was the case even with kitkat. google brains are considered to be among top ranked. then why this missing. is it that when people go to higher levels they ignore such simple and rudimentary things or is it deliberate (any ulterior motive.). the calculator has functions pad but not memory pad. functions are used by selected few. memory i think is needed for everyone for all common people. yes i know i can download from play store. or am i missing some option that adds memory keys