Question

qual é o valor destas somas ?
a)(-7/15)+(+1/6)-3/10
b)(-078)+(+1,47)

Answer 1

a- -14+5/30 - 3/10
-9/30 - 3/10
-3/10 - 3/10
-6/10 = -3/5

b- -0,78+1,47
0,69

Answer 2

Olá,boa noite ☺

a)

(-7/15) + ( + 1/6) - 3/10

m.m.c(6,15,10)=30

(-14+5-9)/30= -18/30  ÷ 6/6 = -3/5

b)

(-078)+(+1,47)
-0,78+1,47
=0,69

Bons estudos :)