Rassmotreny voprosy resheniya zadach v sredakh Mathcad i Maple s ispol"zovaniem fizicheskikh i ekonomicheskikh velichin i edinits ikh izmereniya. Opisany osobennosti raboty s razmernymi velichinami v vychislitel"noj i simvol"noj matematike, a takzhe na grafikakh i v programmakh. Izlozheny pravila ispol"zovaniya razmernykh velichin v nauchno-tekhnicheskikh i ekonomicheskikh raschetakh i konkretnye osobennosti realizatsii mekhanizma razmernostej v sredakh Mathcad i Maple. Dlya prepodavatelej i studentov vuzov, uchaschikhsya kolledzhej, litseev, starshikh shkol"nikov, a takzhe dlya shirokogo kruga chitatelej, ispol"zuyuschikh komp"yutery v inzhenerno-tekhnicheskikh i ekonomicheskikh raschetakh.