Question

Elimine os parenteses e calcule
A- 7-(-6)-(-8)=
B- -8+(-6)-(+3)=
C- 5-6-(+7)+1=
D- -28+7+(+12)+(-1)-6=
E- -21-7-6 (-15)-2-(-10)=
F- 10-(-8)+(-9)-(-12)-6+5=

Answer 1

Olá

Vamos lá,

A- 7-(-6)-(-8)
= 7 +6+8
=13+8
=21

B- -8+(-6)-(+3)
=-8-6-3
=-14-3
=-17

C- 5-6-(+7)+1
= 5-6-7+1
= -1-7+1
=-8+1
=-7
D- -28+7+(+12)+(-1)-6
= -28+7+12-1-6
= -21+12-1-6
= -9-1-6
= -10-6
=-16

E- -21-7-6 (-15)-2-(-10)
= -28+90-2+10
= 62-2+10
=60+10
=70

F- 10-(-8)+(-9)-(-12)-6+5
=10+8-9+12-6+5
=18-9+12-6+5
=9+12-6+5
=21-6+5
=15+5
=20