For subtraction, the suffix Ha' "undo" is attached to boq producing boqHa', literally "dis-ally or dissociate from". Thus, "4 - 3 = 1" would be loS boqHa' wej; chen wa' (literally, "three dissociates from four, one forms"). When subtracting, the subject and object cannot be reversed without changing the equation. wej boqHa' loS would be "3 - 4" and the answer would be a negative number (a concept Maltz wanted to postpone for another time). (HolQeD 9.3, p. 10)For negative numbers, see Dop.