Miscalculating
I believe the answer is:
erring
(Other definitions for erring that I've seen before include "Making 7 down" , "Sinful" , "Going wrong" , "Making a mistake" , "Being incorrect" .)
I believe the answer is:
erring
(Other definitions for erring that I've seen before include "Making 7 down" , "Sinful" , "Going wrong" , "Making a mistake" , "Being incorrect" .)