Question

efetue as operações:
A) 2+5-3-5+15=
B) 12+[35-(10+2)+2]=
C) [(18+3x2)÷8+5x3]÷6=
D)37+[-25-(-11+19-40] =
E) 60÷{2[-7+18÷(-3+12)]}-[7(-3)-18÷(-2)+1]

Answer 1

Resposta:

Explicação passo-a-passo:

A) 2+5-3-5+15=

= 7 - 8 + 15

= - 1 + 15

= 14

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B) 12+[35-(10+2)+2]=

= 12+[35 - (12) + 2]

= 12 + [35 - 12 + 2]

= 12 + [35 - 10]

= 12 + 25

= 37

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C) [(18+3x2)÷8+5x3]÷6=

= [(18+6) ÷ 8 + 15] ÷ 6

= [24 ÷ 8 + 15] ÷ 6

= [ 3 + 15] ÷ 6

= 18 ÷ 6

= 3

____________________

D)

= 37+[-25-(-11+19-40]

= 37 + [- 25 - (8 - 40)]

= 37 + [- 25 - (- 32)]

= 37 + [ - 25 + 32]

= 37 + 7

= 44

E)

60÷{2[-7+18÷(-3+12)]} - [7(-3)-18÷(-2)+1]

= 60÷{2.[-7+18÷9]} - [- 21 + 9 + 1]

= 60 ÷ {2.[-7+2]} - [ - 21 + 10]

= 60 ÷ {2.[-5] - [ - 11]

= 60 ÷ {-10} + 11

= - 6 + 11

= 5