Question

4. Efectúa
) +22+2−782−8−−34−4= ) 12+2−24+22−2−8−32+8+12= ) +12−−20−+42−4−5++52+5+4= ) +2+4+2+3+4−3−3+4=

Answer 1

Es - es menos.

Respuesta:

+22+2−782−8−−34−4=

=24-782-8-34-4

=-758-8-34-4

=-766-34-4

=-800-4

=-804

12+2−24+22−2−8−32+8+12=

=14-24+22-2-8-32+8+12

=-10+22-2-8-32+8+12

=12-2-8-32+8+12

=10-8-32+8+12

=2-32+8+12

=-30+8+12

=-22+12

=-10

+12−−20−+42−4−5++52+5+4=

=-8-42-4-5+52+5+4

=-50-4-5+52+5+4

=-54-5+52+5+4

=-59+52+5+4

=-7+5+4

=-2+4

=2

+2+4+2+3+4−3−3+4

=6+2+3+4-3-3+4

=8+3+4-3-3+4

=11+4-3-3+4

=15-3-3+4

=12-3+4

=9+4

=13