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5
6
+
3
8
)×48=
12
1
4
÷25=
59
78
÷
1
77
=
8
17
÷23+
1
23
×
9
17
=
25
9
÷
5
4
÷
4
5
=
16
5
×3÷
4
5
=
5
9
-
1
2
×
1
3
)÷
5
6
=
3
4
+
5
8
)×32=
5
9
×
3
4
+
5
9
×
1
4
=
10
21
×
12
25
×
7
8
=
88×(
3
8
+
1
44
)=
5
4
×
1
8
×16=
1
5
+
2
9
×
3
10
=
44-72×
5
12
=
14
15
×14+
14
15
=
(1)(
5
6
+
3
8
)×48,
=
5
6
×48+
3
8
×48,
=40+18,
=58;

(2)12
1
4
÷25,
=
49
4
×
1
25

=
49
100


(3)
59
78
÷
1
77

=
59
78
×(78-1),
=
59
78
×78-
59
78
×1,
=59-
59
78

=58
19
78


(4)
8
17
÷23+
1
23
×
9
17

=
8
17
×
1
23
+
1
23
×
9
17

=(
8
17
+
9
17
)×
1
23

=1×
1
23

=
1
23


(5)
25
9
÷
5
4
÷
4
5

=
25
9
÷(
5
4
×
4
5
),
=
25
9
÷1,
=
25
9


(6)
16
5
×3÷
4
5

=
16
5
×3×
5
4

=
16
5
×
5
4
×3,
=4×3,
=12;

(7)(
5
9
-
1
2
×
1
3
)÷
5
6

=(
5
9
-
1
6
)×
6
5

=
5
9
×
6
5
-
1
6
×
6
5

=
2
3
-
1
5

=
7
15


(8)(
3
4
+
5
8
)×32,
=
3
4
×32+
5
8
×32,
=24+20,
=44;

(9)
5
9
×
3
4
+
5
9
×
1
4

=
5
9
×(
3
4
+
1
4
),
=
5
9
×1,
=
5
9


(10)
10
21
×
12
25
×
7
8

=
8
35
×
7
8

=
1
5


(11)88×(
3
8
+
1
44
),
=88×
3
8
+88×
1
44

=33+2,
=35;

(12)
5
4
×
1
8
×16,
=
5
4
×(
1
8
×16),
=
5
4
×2,
=
5
2


(13)
1
5
+
2
9
×
3
10

=
1
5
+
1
15

=
4
15


(14)44-72×
5
12

=44-30,
=14;

(15)
14
15
×14+
14
15

=
14
15
×(14+1),
=
14
15
×15,
=14.
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