Question

calcule: a) (+616)+(-231)= b) (-52)+(-12)= c) (+16)+(-20)=

Answer 1

Resposta:

a) (+616)+(-231)

616 - 231

= +385 ( + ) + ( + ) = +

( - ) + ( - ) = +

( - ) + ( + ) = -

b) (-52)+(-12) ( + ) + ( - ) = -

-52 - 12

= -64

c) (+16)+(-20)

16 - 20

= -4