Question

ВЫПОЛНИТЕ ДЕЙСТВИЯ. 2)а)(-1/2)+(-7/10)-(-3/5)-(+11/20)=

Answer 1

а) = -1/2 - 7/10 + 3/5 - 11/20 = - 10/20 - 14/20 + 12/20 - 11/20 = 12/20 - (10/20 + 14/20 + 11/20) = 12/20 - 35/20 = - 23/20 = - 1 3/20