Question

(-21)+(-12)=
(+10)+(-13)=
(+21)+(-23)=
(+40)+(-17)=

Answer 1

olaaaa!!

(—21) + ( —12 ) = —33

( +10 ) + ( —13) = —3

( + 21 ) + ( —23 ) = —2

( +40 ) + ( —17 ) = 23

:::::::bom , espero ter ajudado:::::::::

Answer 2

Oi...

a) ( - 21) + ( -12) = - 21 - 12 = + 33

b) ( + 10) + ( - 13) = + 10 - 13 = -3

c) (+ 21) + (- 23) = + 21 - 23 = -2

d) ( + 40) + ( - 17) = + 40 - 17 = 23

Espero ter ajudado.