Question

7)Calcule as expressões:

a)12 + 1 2 + (5 +3.2) - 8} + 3 =

b) 45 - {18 +[ 20 -3.(5+ 10:10)1-6)=

c)(3+[2.(7-3) +5] -4}=

d{ 2 + [3:( 9 - 8 ) +4 ] + 1}​

Answer 1

Resposta:

Explicação passo-a-passo:

a)12 + 1 2 + (5 +3.2) - 8} + 3 =

12 + 12 +(5 + 6) - 8} +3

12 +12 + 11 -8} +3

27 + 3

30

b) 45 - {18 +[ 20 -3.(5+ 10:10)1-6}=

45 - {18 +[ 20 -3.(5+1) 1-6}

45 - {18 +[ 20 -3.6 . 1-6}

45 - {18 +{20 -18 . (-6)

45 - 18 +{20 +108}

45 - 18 + 128

27 + 128

155

c){3+[2.(7-3) +5] -4}=

{3+[2.4 +5] -4}

{3+[8 +5] -4}

{3+13 -4}

16-4

12

d{ 2 + [3:( 9 - 8 ) +4 ] + 1}

{ 2 + [3:1  +4 ] + 1}

{ 2 + [3 +4 ] + 1}

{ 2 + 7 + 1}

10