Question

me ayudan ?
-5-(+11)-(-20)=
(+4) + [(+3) +(-7)] + (+1)=
– (-3) + {(-5)-[(+8) + (-10)]}=

Answer 1

Respuesta:

-5-(+11)-(-20)

-5-11-(-20)

-16-(-20)

= 4

(+4) + [(+3) +(-7)] + (+1)=

4+3−7+1

4+−4+1

0+1

=1

– (-3) + {(-5)-[(+8) + (-10)]}=

−(−3)−5−(8−10)

3−5−(8−10)

3−5−(−2)

3+−3

=0