Question

7) Qual é a soma?

( + 3/5) + ( -7/5) =

( - 3/2) + ( + 5/7)=

( + 0,3 ) + ( - 0,7 ) =

( + 4/7) + ( -11/7) + ( - 19/7) =

( - 1,47 ) + ( - 2,5 )=

( + 9,4 ) + ( - 3,27)=​

Answer 1

Resposta:

7)

(+3/5)+(+5/7) = (+3/35)+(+5/35) = 21/35+25/35 = 46/35

(-3/2)+(+5/7) = (-3/14)+(5+14) = -21/14+10/14 = -11/14

(0,3)+(0,7) = 1,0

(4/7)+(-11/7)+(-19/7) = -26/7

(-1,47)+(-2,5) = 3,97

(9,4)+(-3,27) = 6,13