Question

53. RESOLVA as seguintes expressões numéricas:
A) (12-5) = 1-3.2
B) (24 + 14) = 25 - 5 + 5 = 43
C) 25 + (6 + 24 : 12 - 5)
D) [(36 : 9 +7] : 11 + 3
E) 5.(63:9 + 8) + 20.5 -20.3 - 12: 6
F) 7 + {2.3 + [5.(15 -2.4)]}
G) 25 : 5 +2.{13 +2.6- [18 - (5-2).3]}
I) 160 + {3.[15 : 3 + (6.9 -7 . 6) + (17.3 - 45:15]}
J) 120 - 5.7:{ 3 + 16 : 8 + [7. 3 + (5.2-1)]}​

Answer 1

Resposta:

A) 7=-5  b) 38 = 25 = 43  c)28  d)4   e)113   f)48   g)37   i)289   j)119

Explicação passo-a-passo:

A) (12-5) = 1-3.2

7=1-6

7=-5

B) (24 + 14) = 25 - 5 + 5 = 43

38 = 25 = 43

C) 25 + (6 + 24 : 12 - 5)

25+ ( 6+ 2-5)

25+ 3= 28

D) [(36 : 9 +7] : 11 + 3

[4 +7]: 11+3

11:11 +3

1+3= 4

E) 5.(63:9 + 8) + 20.5 -20.3 - 12: 6

75 + 100 -  60- 2

175 - 60-2

115-2= 113

F) 7 + {2.3 + [5.(15 -2.4)]}

7+ { 2.3+[5.(15- 8)]}

7+ {2.3+[5.7]}

7+ {2.3+35}

7+{ 6+ 35}

7+ 41= 48

G) 25 : 5 +2.{13 +2.6- [18 - (5-2).3]}

25 : 5 +2.{13 +2.6- [ 18 - 9)]}

25 : 5 +2.{13 + 12 - 9]}

25 : 5 +2.{25-9]}

25 : 5 +2. 16

 5 + 32 = 37

I) 160 + {3.[15 : 3 + (6.9 -7 . 6) + (17.3 - 45:15]}

160+ { 3 . [ 15 : 3 + ( 32 - 42)  + ( 51 - 3)]}

160+ { 3 . [ 15 : 3 + ( -10)  + 48 ]}

160+ { 3 . [ 15 : 3 -10  + 48 ]}

160+ { 3 . [5 -10  + 48 ]}

160+ { 3 . [-5  + 48 ]}

160 + { 3. 43}

160 + 129= 289

J) 120 - 5.7:{ 3 + 16 : 8 + [7. 3 + (5.2-1)]}​

120 - 5.7:{ 3 + 16 : 8 + [7. 3 + 9]}​

120 - 5.7:{ 3 + 16 : 8 + 30}​

120 - 5.7:{ 3 + 2 + 30}​

120 - 5.7: 35

120 - 35 : 35

120 - 1= 119