Sumation or Summation: How To spell?

The word Sumation is misspelled against Summation, a verb meaning "The act of summing, or forming a sum, or total amount; also, an aggregate."

Summation has double "mm" is mispronounced as "m"
Remember double 'MM' in between the strings su & ation which should not be misspelled with single 'M'
Wrong Spelling: su-m-ation
Correct Spelling: su-mm-ation
Check more misspelled words of Summation to spell it correct.