Abuur nooc ka mid ah weedhan oo ka adag Haddii ay ka go 'an tahay,'y ', ay leedahay tiro ka yar tirada ka go 'an tahay,'x ', eberada hore waa in lagu daraa habka labaad.
Dabcan, nooc ka sii adag ee jumlada waa "Haddii subtrahend, '' y ',' uu leeyahay tiro ka yar minuend, 'x', eberada hore waa in lagu daraa, taas oo noqon doonta sagaal hor leh marka dhammaystirka la qaato. "