Question

15. Calcula. a) (5-7) - [(-3) + (-6)] b) (-8) + [(+7) - (-4) + (-5) ] c) (+9) - [(+3) - (3 - 12) - (+8)] d) [(+6)-(-8)] - [(-4) - (-10)] e) [(2-8) + (5 - 7)] - [(-9 + 6)-(-5+7)]
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Answer 1

Respuesta:

Calcula.

a) (5-7)-[(-3)+(-6)] =

-2-[-3+-6] =

-2-[-9] =

-2+9 = 7

b) (-8)+[(+7)-(-4)+(-5)] =

-8+[+7+4-5] =

-8+[11-5] =

-8+6 = -2

c) (+9)-[(+3)-(3-12)-(+8)] =

(+9)-[(+3)-(-9)-(+8)] =

9-[3+9-8] =

9-[12-8] =

9-4 = 5

d) [(+6)-(-8)]-[(-4)-(-10)] =

[6+8]-[-4+10] =

[6+8]-[-4+10] =

14-6 = 8

e) [(2-8)+(5-7)]-[(-9+6)-(-5+7)] =

[-6+-2]-[-3-2] =

-8-[-5] =

-8+5 = -3

Espero te sirva :)

Answer 2

Respuesta:

a) (5-7) - [(-3) + (-6)] = 7

b) (-8) + [(+7) - (-4) + (-5)] = -2

c) (+9) - [(+3) - (3 - 12) - (+8)] = 5

d) [(+6)-(-8)] - [(-4) - (-10)] = 8

e) [(2-8) + (5 - 7)] - [(-9 + 6)-(-5+7)] = -3