Question

resuelve las siguientes operaciones ​

Answer 1

Respuesta:

a)

12 - [2 + (-3 - 4) - (-2 + 4)] + 4

12 - [2 - 3 - 4 + 2 - 4 ] + 4

12 - [-7] + 4

12 + 7 + 4

19 + 4

23

b)

[78 - (-78) + 78] - (-75)

[78 + 78 + 78] + 75

234 + 75

309

c)

4 + [8 - (2 - 3 + 5) - 1]

4 + [8 - 2 + 3 - 5 - 1]

4 + [3]

7

d)

$5\frac{3}{4} - (4\frac{1}{2}- \frac{4}{7} )\\\\\frac{23}{4} - (\frac{9}{2} - \frac{4}{7} )\\\\ \frac{23}{4} - (\frac{63 - 8}{14} )\\\\\frac{23}{4} - \frac{55}{14} \\\\\frac{161 - 110}{28}\\\\\frac{51}{28}$

Explicación paso a paso: