Question

Решите пожалуйста
С буквы "з" по "л"

Answer 1

з) - 2/3 +(-3/5)= - 10/15 + (-9/15) = - 10/15-9/15 = - 19/15 = - 1 4/15
и) - 4/5+ (-5/6)= - 24/30 + (-25/30) = -24/30-25/30= -49/30 = -1 19/30
к)  -3 1/7 + (-1 3/14) = -3 2/14 + (-1 3/14) = -3 2/14- 1 3/14 = - 4 5/14
л)  -1 2/5 + ( - 2,8) = - 1,4+(-2,8) =-1,4-2,8= -4,2