а)(-1/2) +(-5); б) (-7) + (-2/3)

а)(-1/2) +(-5)=-0,5-5=-5,5;/// б) (-7) + (-2/3)=-7-2/3=-7 2/3

а) ( - 1/2) + ( - 5) = ( - 1/2) - 5 = - 5 1/2 = - 5,5; б) ( - 7) + ( - 2/3) = ( - 7) - 2/3 = - 7 2/3.