Question

chicos ayudenme haciendo estos ejercicos son de 8vo de basica pls les dare todos los puntos q tengo hecho con proseso gracias
a) 6+[5+(7+2)] = ?
b) 15-[10-(8+4) = ?
c) 12-[7-(2-10)] = ?
d) (-6)+[5+(2-12)] = ?
e) (-7)-[3-(4-9)] = ?
f) (2-10)+[5-(8+2)] = ?
g) (12-3)-[1-(2-6)] = ?
h) [9-(+5)]+[7+(-10)] = ?
i) [10-(-2)]-[5-(+12) = ?
j) [8-(6+4)]-(5-7) = ?
k) [1+(6-9)]-(8-12

Answer 1

Explicación paso a paso:

tomar en cuenta la "Ley de signos" ↓(en la imagen)

a) 6+[5+(7+2)] =

6+[5+9]

6+14

20

b) 15-[10-(8+4) =

15-(10-12)

15-(-2)

17

c) 12-[7-(2-10)] =

12-[7-(-8)]

12-15

-3

d) (-6)+[5+(2-12)] =

(-6)+[5+(-10)]

(-6)-5)

-11

e) (-7)-[3-(4-9)] =

(-7)-[3-(-5)]

(-7)-[-2]

-9

f) (2-10)+[5-(8+2)] =

(2-10)+[5-10]

-8 -5

-13

g) (12-3)-[1-(2-6)] =

(12-3)-[1-(-4)]

(12-3)-[1-(-4)]

-9 + 3

-6

h) [9-(+5)]+[7+(-10)] =

4+[-3]

1

i) [10-(-2)]-[5-(+12) =

[8]-[-7)

15

j) [8-(6+4)]-(5-7) =

[8-(10)]-(-2)

-2 + 2

0

k) [1+(6-9)]-(8-12

[1+(-3)]-(-4)

-2 + 4

2

Answer 2

Respuesta:

Explicación paso a paso:

a) 6+[5+(7+2)] =

6+[5+9]

6+14

20

b) 15-[10-(8+4) =

15-(10-12)

15-(-2)

17

c) 12-[7-(2-10)] =

12-[7-(-8)]

12-15

-3

d) (-6)+[5+(2-12)] =

(-6)-5)

-11

e) (-7)-[3-(4-9)] =

(-7)-[3-(-5)]

(-7)-[-2]

-9

f) (2-10)+[5-(8+2)] =

(2-10)+[5-10]

-8 -5

-13

g) (12-3)-[1-(2-6)] =

(12-3)-[1-(-4)]

(12-3)-[1-(-4)]

-9 + 3

-6

h) [9-(+5)]+[7+(-10)] =

4+[-3]

1

i) [10-(-2)]-[5-(+12) =

[8]-[-7)

15

j) [8-(6+4)]-(5-7) =

[8-(10)]-(-2)

-2 + 2

0

k) [1+(6-9)]-(8-12

[1+(-3)]-(-4)

-2 + 4

2