Question

2. Resolver a expressão:
(–3/7).(+2,1)–(+5/9).(–1,5)=
(–3/7).(21/10).(+5/9).(–15/10)=
(–63/70)–(75/90)=
(–9/10)–(–150/180)=
(–162/180)+150/180=12/180=-1/15

Answer 1

Resposta:

(--3/7.(2,1)--(+5/9).(--1.2)=3+7=10/2+1=3/5+9=14/1-5=4 explicação passo a passo