Question

1) Calcula as expressões numéricas.
a) -7 + 4.6 + 2=
b) 8.7 +9=
c) 7 – (1 + 3)=
d) 9 – (5 -1 + 2)=
e) 10 – (2 + 5) + 4=
f) (13 – 7) + 8 – 1=
g) (10 – 4) – (9.8) + 3=
h) 50 – [37 – (15 – 8)]=
i) 26 + {12 – [(30 – 18) + (4 – 1) – 6 ] – 1}=
j) [- 7 +14 : (5 – 7)] : 7=
k) [- 13 + 13 . (- 1 – 3 . 4)] : 14=
l) 1 – [7 – (4 – 3 .2) . (-1 -1)] .5=

Answer 1

Resposta:

Explicação passo a passo:

a) -7 + 4.6 + 2= -5 + 24 = 19

b) 8.7 +9= 56 + 9 = 65

c) 7 – (1 + 3)= 7 - 4 = 3

d) 9 – (5 -1 + 2)= 9 - 6 = 3

e) 10 – (2 + 5) + 4= 10 - 7 + 4 = 7

f) (13 – 7) + 8 – 1= 6 + 8 = 14

g) (10 – 4) – (9.8) + 3= 6 - 72 + 3 = 63

h) 50 – [37 – (15 – 8)]= 50 - [30] = 20

i) 26 + {12 – [(30 – 18) + (4 – 1) – 6 ] – 1}= 26 + {12 – [12 + 3 – 6 ] – 1}= 26 + {12 – 9 – 1}= 26 + 2 = 28

j) [- 7 +14 : (5 – 7)] : 7= [- 7 + 14/-2]  / 7 = [-7-7]/7 = -14/7 = -2

k) [- 13 + 13 . (- 1 – 3 . 4)] : 14=  [- 13 + 13 . -13] : 14= [- 13 - 169] : 14= -182/14 = -13

l) 1 – [7 – (4 – 3 .2) . (-1 -1)] .5= 1 – [7 – (–2) . (-2)] .5=  1 – [7- 4] .5= 1 – 3.5= 1 - 15 = -14