Question

A) 3 – 6 + 5 + 3 + 8– 7 + 1 – 2 =
b) 22 – 13 – 4 + 5 + 9 – 7 – 18 + 11 =
c) 7 – 2 – 3 – 4 – 5 – 6 – 12 + 20 =
d) 25 + 2 + 3 – 7 – 9 – 5 – 6 =
e) 8 – 5 – 5 – 5 – 7 + 12 + 3 + 2 =
f) 31 – 24 – 12 + 45 – 26 – 7 =
g) 16 – 16 – 38 + 7 + 9 – 11 + 24 =
h) 90 – 56 + 2 – 24 – 13 + 6 – 9 =
i) 15 – 13 + 27 – 21 – 2 + 3 =
j) 1 – 1 – 1 – 1 + 1 + 1 + 1 – 1 =
k) 2 + 0 – 5 – 3 + 0 – 1 + 0 – 4 =
l) 11 – 4 – 67 + 34 + 8 + 6 – 3 =
m) 9 – 8 – 9 + 8 + 9 – 8 =
n) 4 – 5 – 6 + 2 – 3 + 1 – 7 + 9 =
o) 14 – 17 – 8 + 65 =

Answer 1

Respuesta:

1. 5
2. 5
3. – 5
4. 3
5. 3
6. 7
7. – 9
8. – 4
9. 9
10. 1
11. – 11
12. – 15
13. 1
14. – 5
15. 54

Explicación paso a paso:

a)

3 – 6 + 5 + 3 + 8 – 7 + 1 – 2 =

3 + 5 + 3 + 8 + 1 – 6 – 7 – 2 =

8 + 3 + 8 + 1 – 6 – 7 – 2 =

11 + 8 + 1 – 6 – 7 – 2 =

19 + 1 – 6 – 7 – 2 =

20 – 6 – 7 – 2 =

20 – ( 6 + 7 + 2) =

20 – ( 13 + 2 ) =

20 – 15 =

5

b)

22 – 13 – 4 + 5 + 9 – 7 – 18 + 11 =

22 + 5 + 9 + 11 – 13 – 4 – 7 – 18 =

22 + 5 + 20 – ( 13 + 4 + 7 + 18 ) =

27 + 20 – ( 20 + 4 + 18 ) =

47 – ( 24 + 18 ) =

47 – 42 =

5

c)

7 – 2 – 3 – 4 – 5 – 6 – 12 + 20 =

7 + 20 – 2 – 3 – 4 – 5 – 6 – 12 =

27 – ( 2 + 3 + 4 + 5 + 6 + 12 ) =

27 – ( 2 + 3 + 10 + 5 + 12 ) =

27 – ( 5 + 10 + 5 + 12 ) =

27 – ( 10 + 10 + 12 ) =

27 – ( 20 + 12 ) =

27 – 32 =

– ( 32 – 27 ) =

– 5

d)

25 + 2 + 3 – 7 – 9 – 5 – 6 =

27 + 3 – ( 7 + 9 + 5 + 6 ) =

30 – ( 16 + 5 + 6 ) =

30 – ( 21 + 6 ) =

30 – 27

3

e)

8 – 5 – 5 – 5 – 7 + 12 + 3 + 2 =

8 + 12 + 3 + 2 – 5 – 5 – 5 – 7 =

20 + 3 + 2 – ( 5 + 5 + 5 + 7 ) =

23 + 2 – ( 3 × 5 + 7 ) =

25 – ( 15 + 7 ) =

25 – 22

3

f)

31 – 24 – 12 + 45 – 26 – 7 =

31 + 45 – ( 24 + 12 + 26 + 7 ) =

76 – ( 50 + 12 + 7 ) =

76 – ( 62 + 7 ) =

76 – 69 =

7

g)

16 – 16 – 38 + 7 + 9 – 11 + 24 =

– 38 + 7 + 9 – 11 – 24 =

– ( 38 + 11 ) + 7 + 9 + 24 =

– 49 + 7 + 9 + 24 =

– 49 + 16 + 24 =

– 49 + 40 =

– ( 49 – 40 ) =

– 9

h)

90 – 56 + 2 – 24 – 13 + 6 – 9 =

90 + 2 + 6 – 56 – 24 – 13 – 9 =

92 + 6 – ( 56 + 24 + 13 + 9 ) =

98 – ( 80 + 13 + 9 ) =

98 – ( 93 + 9 ) =

98 – 102 =

– ( 102 – 98 ) =

– 4

i)

15 – 13 + 27 – 21 – 2 + 3 =

15 + 27 + 3 – 13 – 21 – 2 =

15 + 30 – ( 13 + 21 + 2 ) =

45 – ( 34 + 2 ) =

45 – 36 =

9

j)

1 – 1 – 1 – 1 + 1 + 1 + 1 – 1 =

– 1 – 1 + 1 + 1 + 1 + 1 – 1 =

– 1 + 1 + 1 + 1 – 1 =

1 + 1 – 1 =

1

k)

2 + 0 – 5 – 3 + 0 – 1 + 0 – 4 =

2 – 5 – 3 – 1 – 4 =

2 – ( 5 + 3 + 1 + 4 ) =

2 – ( 8 + 1 + 4 ) =

2 – ( 9 + 4 ) =

2 – 13 =

– ( 13 – 2 ) =

– 11

l)

11 – 4 – 67 + 34 + 8 + 6 – 3 =

11 + 34 + 8 + 6 – 4 – 67 – 3 =

11 + 40 + 8 – ( 4 + 67 + 3 ) =

51 + 8 – ( 4 + 70 ) =

59 – 74 =

– ( 74 – 59 ) =

– 15

m)

9 – 8 – 9 + 8 + 9 – 8 =

– 8 + 8 + 9 – 8 =

9 – 8 =

1

n)

4 – 5 – 6 + 2 – 3 + 1 – 7 + 9 =

4 + 2 + 1 + 9 – 5 – 6 – 3 – 7 =

4 + 2 + 10 – ( 5 + 6 + 3 + 7 ) =

6 + 10 – ( 5 + 6 + 10 ) =

16 – ( 11 + 10 ) =

16 – 21 =

– ( 21 – 16 ) =

– 5

o)

14 – 17 – 8 + 65 =

14 + 65 – 17 – 8 =

79 – ( 17 + 8) =

79 – 25 =

54

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