Раскройте скобки и найдите значение выражения: а) (-2) *(12+11) б) 8*(5-30) в) (-15)*(2+10-4) г) (-6)*(-15-20) д)(-7)*(-3+7)

а) ( - 2 ) * ( 12 + 11 ) = - 2 * 23 = - 46 б ) 8 * ( 5 - 30 ) = 8 * ( - 25 ) = - ( 8 * 25 ) = - ( 8 * 20 + 8 * 5 ) = - ( 160 + 40 ) = - 200 в ) ( - 15 ) * ( 2 + 10 - 4 ) = - 15 * ( 12 - 4 ) = - 15 * 8 = - ( 10 * 8 + 5 * 8 ) = - ( 80 + 40 ) = - 120 г ) ( - 6 ) * ( - 15 - 20 ) = - 6 * ( - 35 ) = 6 * 35 = 6 * 30 + 6 * 5 = 180 + 30 = 210 д ) ( - 7 ) * ( - 3 + 7 ) = - 7 * 4 = - 28 е ) ( 8 - 3 - 11 ) * ( - 9 ) = - 6 * ( - 9 ) = 6 * 9 = 54 ж) ( - 2 - ( - 8 ) ) * ( - 7 ) = 7 * 6 = 42 з) ( - 5 ) * ( - 9 + 4 ) = - 5 * ( - 5 ) = 25 и) ( 4 - ( - 8 ) ) * ( - 2 ) = 4 * ( - 2 ) = - 8