Question

Efectúa cada una de las siguientes operaciones combinadas:
a) [2 - (-1)]+ 5 x 2 x [ -16 - 30: - 2]
b) [5+ 2 x (4 - 3) ]: [6 -(-1)] -2
c)3 x (2-7) +5 x (1 -5 ) -3 (2x-3x7 -4 x -6 x2)
d)-12: [6: (-7 + 5) - (6 -4) : 2] : - 1

Answer 1

Respuesta:

a) [2 - (-1)]+ 5 x 2 x [ -16 - 30: - 2]

2+1+5×2(-16-30/-2)

3+5×2(-16-30/-2)

3+10(-16-30/-2)

3+10(-16-(-15))

3+10(-16+15)

3+10(-1)

3-10

-7

b)[5+ 2 x (4 - 3) ]: [6 -(-1)] -2

$\frac{5 + 2}{6 - ( - 1)} - 2$

$\frac{5 + 2 }{6 - ( - 1)} - 2$

$\frac{7}{6 - ( - 1)} - 2$

$\frac{7}{6 + 1} - 2$

$\frac{7}{7} - 2$

1-2

-1

c)3 x (2-7) +5 x (1 -5 ) -3 (2x-3x7 -4 x -6 x2)

36-7+5(1-5-3(2(-3)×7-4(-6×2)

29+5(1-5)-3(2(-3)×7-4(-6)×2)

29+5(-4)-3(2(-3)×7-4(-6)×2)

29-20-3(2(-3×7-4(-6×2)

9-3(2(-3)×7-4(-6)×2)

9-3(-6×7-4(-6×2)

9-3(-42-4(-6)×2)

9-3(42-(-24×2))

9-3(-42-(-48))

9-3(-42+48)

9-3×6

9-18

-9