Question

4
Calcule o valor das expressões.
a) – 76 – 17 – 18) + [70 - (49 - 81)]
b) -(-2) – 7 - [-18 + 4 + (7 - 15)]
c) –{20 – (2 - 10) + [-30 -(-70)]}
d) {[(73 – 64) + 20) – (40 – 31)} + (-3)
​

Answer 1

A)-76-(-11)+(70 -(-32))

-76+11+ (70+32)

-65 + 102

37

B)-(-2)-7-(-18+4+(7-15))

+2 -7 -(-18+4+(-8))

2-7-(-18+4-8)

2-7-(-22)

2-7+22 = 17

C)-(20-(2-10)+(-30-(-70)))

-(20-(-8)+(-30+70))

-(20+8+ 40)

-(68)

-68

D)(((73-64)+20)-(40-31))+(-3)

((9+20)-(9))+(-3)

(29-9)+(-3)

20-3

17

espero ter ajudado <3