Profesor - page 28

3
Números enteros
22
70
Calcula.
a)
36
(
3) : (
2) : 6
c)
7
4
(
2) : (
14)
b)
125 : 5
(
3)
7
d)
200 : (
20)
(
4)
(
3)
a)
36
(
3) : (
2) : 6
=
108 : (
2) : 6
=
54 : 6
=
9
b)
125 : 5
(
3)
7
=
25
(
3)
7
=
75
7
=
525
c)
7
4
(
2) : (
14)
=
28
(
2) : (
14)
=
56 : (
14)
=
4
d)
200 : (
20)
(
4)
(
3)
=
10
(
4)
(
3)
=
40
(
3)
=
120
71
Opera.
a)
3
(4
+
5)
+
(12
15)
+
1
b)
(14
3
12)
+
(2
8)
3
c)
19
+
12
(15
+
7)
7
+
2
d)
5
+
7
(8
19)
(12
4
+
3)
a)
3
9
+
(
3)
+
1
=
6
+
(
3)
+
1
=
9
+
1
=
8
b)
(
1)
+
(
6)
3
=
5
3
=
8
c)
31
22
7
+
2
=
9
7
+
2
=
2
+
2
=
4
d)
2
(
11)
(11)
=
13
11
=
2
72
Efectúa estas operaciones.
a)
12
(4
(5
+
3)
15)
+
1
b)
(9
3)
+
(8
(2
3))
c)
2
(15
+
(7
10)
3)
+
2
d)
(
4
+
(13
7))
(5
9)
e)
5
7
+
((4
6)
10)
+
3
a)
12
(4
8
15)
+
1
=
12
(
19)
+
1
=
31
+
1
=
32
b)
(9
3)
+
(8
(2
3))
=
6
+
(8
(
1))
=
6
+
9
=
3
c)
2
(15
+
(7
10)
3)
+
2
=
2
(15
+
(
3)
3)
+
2
=
2
9
+
2
=
5
d)
(
4
+
6)
(
4)
=
2
(
4)
=
2
e)
5
7
+
((
2)
10)
+
3
=
5
7
+
(
12)
+
3
=
11
73
Realiza las siguientes operaciones combinadas.
a)
5
+
3
(
4)
b)
12
(
4) : 2
c)
(
5
+
3)
(
4)
d)
9
+
3
(
5)
e)
(
7
(
3)) : (
2)
a)
5
12
=
17
b)
12
(
2)
=
14
c)
2
(
4)
=
8
d)
9
15
=
24
e)
4 : (
2)
=
2
74
Efectúa estas operaciones combinadas.
a)
12
3
(5
12)
+
15 : (9
3
2)
b)
3
+
10
(9
4
3)
(5
6)
c)
(4
7
5)
(
2)
(12
+
4 : (
2))
d)
9
(
5
+
7)
(42 : (5
12)
+
1)
a)
12
3
(
7)
+
15 : (9
6)
=
12
+
21
+
15 : 3
=
12
+
21
+
5
=
38
b)
3
+
10
(9
12)
(
1)
=
3
+
10
(
3)
(
1)
=
3
30
(
1)
=
32
c)
(4
35)
(
2)
(12
2)
=
31
(
2)
10
=
62
10
=
52
d)
9
2
(42 : (
7)
+
1)
=
9
2
(
6
+
1)
=
9
2
(
5)
=
12
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