deviate
discount
disregard
err
fall into error
go amiss
go astray
go awry
go wrong
judge amiss
lapse
misappreciate
miscompute
misconjecture
misconstrue
miscount
misdeem
misesteem
misestimate
misevaluate
misinterpret
misjudge
misread
misreckon
misthink
misunderstand
misvalue
overestimate
overlook
overprize
overrate
overvalue
slip
slip up
stray
stumble
trip
underestimate
underprize
underrate
undervalue
wander
calculate
cipher
compute
cypher
figure
reckon
work out
miscalculated
miscalculates
miscalculating
recalculate