Numeric.Ops already has ops defined for *, +, - to go with .times, .plus and .minus etc. etc.
See: https://github.com/scala/scala/blob/8e0bc0bffd31d994a6911116f170347004934c55/src/library/scala/math/Numeric.scala#L217
It should have < to go with .lt and .>= to go with .geteq etc.