№ 1 упростите выражение.
а) m * 4,5 * 4 =
б) -10 * а * 1,2 =
в) х * (-2) * у * (-3,5)=
№2 приведите подобные слагаемые.
а)16с-10с=
б)12m-m+9m=
в)6+4а-5а+а-7а
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