Question

resolva as expressões numéricas a seguir

a) 2/3+5/6-1/2=
b) 7/9-5/6-2/3=
c) 1-0,47-1,9+0,63=
d) -47+2-1,75+1,48=
e) (-7/9)×(+2/7)×(-1/6) =
f) (-1,5)×(+0,36)×(+2,7)=
g) (-2)×(-3/4)×(-1/7)=
h) (+3/5)÷(-4/3)÷(-3)=
i) (-4/5)÷(+8/5)-(+2)÷(-5/4)=
j) (+5/8)÷(-2)-3×(-1/4)=
k) (-5,6)÷ (-2,8)-(+0,25)÷(-0,5)=
l) (-3/4) elevado a 2 ÷(-9/8)=
m) (-7/9)÷(-7/6)-(-5/6) elevado a 2

ATENÇÃO NOS SINAIS

ME AJUDEM :) ​

Answer 1

Resposta:

a) 2/3+5/6-1/2= 4+5-3/6 = 6/6 = 1

b) 7/9-5/6-2/3 = 14-15-12/18 = -13/18

c) 1-0,47-1,9+0,63 = -0,74

d) -47+2-1,75+1,48= -45.,27

e) (-7/9)×(+2/7)×(-1/6) = + 14/378 = 1/27

f) (-1,5)×(+0,36)×(+2,7) = -1,458

g) (-2)×(-3/4)×(-1/7) = -6/28 = -3/14

h) (+3/5)÷(-4/3)÷(-3) = -9/20 . (-1/3) = +9/60 = 3/20

i) (-4/5)÷(+8/5)-(+2)÷(-5/4) = -1/2 - (-8/5) = -5+16/10 = -11/10

j) (+5/8)÷(-2)-3×(-1/4) = -5/16 + 3/4 = -5+12/16 = 7/16

k) (-5,6)÷ (-2,8)-(+0,25)÷(-0,5) = 2,5

l) (-3/4)² ÷ (-9/8) = 9/16 . (-8/9) = -1/2

m) (-7/9)÷(-7/6)-(-5/6)² = 6/9 - 25/36 = 24-25/36 = -1/36

Espero ter ajudado. Abs