题目内容

1
3
×(
8
3
-
5
6
)=
(13+
1
9
)×
9
13
=
66
13
×12+
66
13
=
6
5
×
2
15
+
2
15
÷
5
4
=
8
3
×(
1
3
-
8
21
×
8
16
)=
9
10
×11-
9
10
=
5
7
×
1
4
+
3
4
×
5
7
=
1
3
+
4
7
+
2
3
+
1
7
=
4
5
×
3
8
×
5
9
=
101×
1
7
-
1
7
=
6
47
×48=
1
7
×34×7×
2
17
=
(1)
1
3
×(
8
3
-
5
6
),
=
1
3
×
11
6

=
11
18


(2)(13+
1
9
)×
9
13

=13×
9
13
+
1
9
×
9
13

=9+
1
13

=9
1
13


(3)
66
13
×12+
66
13

=
66
13
×(12+1),
=
66
13
×13,
=66;

(4)
6
5
×
2
15
+
2
15
÷
5
4

=
6
5
×
2
15
+
2
15
×
4
5

=(
6
5
+
4
5
)×
2
15

=2×
2
15

=
4
15


(5)
8
3
×(
1
3
-
8
21
×
8
16
),
=
8
3
×(
1
3
-
4
21
),
=
8
3
×
1
7

=
8
21


(6)
9
10
×11-
9
10

=
9
10
×(11-1),
=
9
10
×10,
=9;

(7)
5
7
×
1
4
+
3
4
×
5
7

=
5
7
×(
1
4
+
3
4
),
=
5
7
×1,
=
5
7


(8)
1
3
+
4
7
+
2
3
+
1
7

=(
1
3
+
2
3
)+(
4
7
+
1
7
),
=1+
5
7

=1
5
7


(9)
4
5
×
3
8
×
5
9

=
3
10
×
5
9

=
1
6


(10)101×
1
7
-
1
7

=(101-1)×
1
7

=100×
1
7

=
100
7


(11)
6
47
×48,
=
6
47
×(47+1),
=
6
47
×47+
6
47
×1,
=6+
6
47

=6
6
47


(12)
1
7
×34×7×
2
17

=(
1
7
×7)×(
2
17
×34),
=1×4,
=4.
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