Question

15)Resolva as expressões numéricas:
a) 7 -(1 + 3) =
d) 25+ { 12 + [ 2-(8-6) +2 ]} =
e) 10 -(2 + 5 ) + 4 =
f) {[(18 – 3 )+(7 + 5) – 2 ] + 5 } – 12 =
g) 28 + [50 – (24 – 2) -10] =
h) 38 – { 20 - [ 22 – ( 5 + 3) + ( 7 – 4 +1)]}​

Answer 1

Resposta:

a) 7-(1+3)

7-4

3

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

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

25+{12+2}

25+14

36

e) 10-(2+5)+4

10-7+4

7

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

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

{25+5}-12

30-12

18

g) 28+[50-(24-2)-10]

28+[50-22-10]

28+18

46

h) 38-{20-[22-(5+3)+(7-4+1)]}

38-{20-[22-2+4]}

38-{20-24}

38+4

42

Answer 2

Explicação passo-a-passo:

A) 7 - (1 + 3) = 7 - 4 = 3

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

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

25 + {12 + [0 + 2]}

25 + {12 + 2}

25 + 14

39

E) 10 - (2 + 5) + 4

10 - 7 + 4

3 + 4

7

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

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

{27 - 2 + 5} - 12

25 + 5 - 12

30 - 12

18

G) 28 + [50 - (24 - 2) - 10]

28 + [50 - 22 - 10]

28 + 28 - 10

56 - 10

46

H) 38 - {20 - [22 - (5 + 3) + (7 - 4 + 1)]}

38 - {20 - [22 - 8 + (3 + 1)]}

38 - {20 - [22 - 8 + 4]}

38 - {20 - [14 + 4]}

38 - {20 - 18}

38 - 2

36

espero ter ajudado ♡