Упрастите выражения: а)4*(-2а) ,б) (-1)*(4а) ,в) 4а:2 ,г) (-6х)*(-3) ,д) (-16)*3у, е) (-6х):(-3), ж) 5*(-4у), з)(-5а)*(-5), и)(-8у):(-4), к)(-7с)*7, л)(-16у)*3, м)(-15с):5. СРОЧНО!!!
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