Question

9 Calcula.
a) 6 + 15 + (7 + 2)]
b) 8+ [4-(3+5)]
c) 10 - [6 + (2 + 7) D)15 – [2-(6-10)]
e) 15 - [10 – (8 + 4)]
f) 12 - 17 - (2-10)]
g) (-6) + [5+ (2 - 12) h)(-7) – [3 – (4 – 9)]​

Answer 1

A) 6 + 15 + 9
24 + 6 = 30
B) 8+ [ 4 - [ + 8] ]
8 + [ 4-8]
8 + [ -4]
8 - 4 = 4
C) 10 - [ 6+ 9 ]
10 - [ + 15]
10 - 15 = -5
e) 15 - [ 10 - (+12)]
15 - [ 10 - 12 ]
15 - [ -2]
15+2 = 17
D) 15 - [ 2 - ( -4) ]
15 - [+6]
15-6 = 9
F) 12-17-(-8)
12-17+8
-5 + 8 = 3
G) -6 + [ 5 + [-10]]
-6 + [ 5-10]
-6 + [ -5]
-6 - 5 = -11
H) -7 - [ 3- [ -5]]
-7 - [ 3 + 5]]
-7 - [ +8]
-7 - 8 = -15

Answer 2

Respuesta:

a) 6 + 15 + (7 + 2)

21 + 9

= 30

b) 8 + [4-(3+5)]

= 8 + [4-(8)]

= 8 + 4 - 8

= 4

c) 10 - [6 + (2 + 7)]

= 10 - [6 + 9]

= 10 - 15

= -5

d)15 – [2-(6-10)]

= 15 – [2-(-4)]

= 15 – [2 + 4]

= 15 – 6

= 9

e) 15 - [10 – (8 + 4)]

= 15 - [10 – 12]

= 15 + 2

= 17

f) 12 - 17 - (2-10)]

= 12 - 17 - (-8)

= 12 - 17 + 8

= 3

g) (-6) + [5+ (2 - 12)]

= -6 +  [5+ (-10)]

= -6 +  [5 -10]

= -6 - 5

= -11

h)(-7) – [3 – (4 – 9)]​

= -7 – [3 – (-5)]​

= -7 – [3 + 5]​

= -7 – 8

= - 15