Question

Номер 1015(б,г,д) побыстрее плиз

Answer 1

б) 1/4 - 1/7 -3/4 + 1/7 = ( 1/4 - 3/4 ) + (-1/7 + 1/7) = -2/4 + 0 = - 2/4 = -1/2

г) -1/2 * 3 1/5 + (-1/2) * (-2 1/5) = -1/2 * (3 1/5 - 2 1/5) = - 1/2 * 1 = - 1/2

д) -6 * ( 1 1/2 + 1 1/3) = -6 * 3/2 + (-6) * 4/3 = -9 -8 = -17