Question

calcule as adição (+3)+(+8)+(+15)=​

Answer 1

Regras dos sinais:

( + ) × ( + ) = +
( - ) × ( - ) = +
( + ) × ( - ) = -
( - ) × ( + ) = -

Resolução:

(+ 3) +( + 8)+ (+15)
3 + 8 + 15
11 + 15
26

Answer 2

(+3)+(+8)+(15)=3+8=11+15=26