Question

1)Calcule o valor das expressões:

a) 7- (1 + 3)

e) 25+ {12 + [2-(8-6)]+2}

b) 9-(5-1+2)

f) {[(18 - 3 ) + ( 7 + 5) - 2] + 5 } - 12

c) (-3)*4 .(9-8)

g) ( - 16 ) + [ 10 - ( 18:32 ) + 2 + 53 ]

d) (20 + 8): (3+4)

h) 52 - [ 12-(3.2 + 1)]​

Answer 1

Explicação passo-a-passo:

a) 7- (1 + 3)

7-4=3

e) 25+ {12 + [2-(8-6)]+2}

25+{12+[2-2]+2}

25+{12+2}

25+14=39

b) 9-(5-1+2)

9-6=3

f) {[(18 - 3 ) + ( 7 + 5) - 2] + 5 } - 12

{[15+12-2]+5} -12

{25+5} -12 = 18

c) (-3)*4 .(9-8)

-12*1= -12

g) ( - 16 ) + [ 10 - ( 18:32 ) + 2 + 53 ]

d) (20 + 8): (3+4)

28/7= 4

h) 52 - [ 12-(3.2 + 1)]

52-5 = 47