Answer: plussign

AnswerCrossword Clue
PLUSSIGN

Grade school operator

PLUSSIGN

Sum thing?

PLUSSIGN

Arithmetical symbol.

PLUSSIGN
Formula symbol.
PLUSSIGN
Ion symbol
PLUSSIGNA little cross?
PLUSSIGNIon indicator
PLUSSIGNSummer symbol?
PLUSSIGNL.G.B.T.Q.I.A. follower