题目内容

计算下面各题.(能简便的就简便)
7
15
×14+
7
15
(
7
12
+
1
24
)÷
1
2
9
28
×14×
4
9
12÷
5
6
×
5
12
14
5
÷
2
5
÷
1
7
1
4
÷
5
6
×
5
12
(
5
14
+
5
7
)÷
6
7
1
3
×
(
4
5
-
5
7
)
(1)
7
15
×14+
7
15

=
7
15
×(14+1)
=
7
15
×15
=7;

(2)(
7
12
+
1
24
)÷
1
2

=
7
12
×
2+
1
24
×
2
=
7
6
+
1
12

=1
1
4
;

(3)
9
28
×
14×
4
9

=
9
28
×
4
9
×14
=
1
7
×
14
=2;

(4)12÷
5
6
×
5
12

=12×
5
12
÷
5
6

=5÷
5
6

=6;

(5)
14
5
÷
2
5
÷
1
7

=
14
5
÷(
2
5
×
1
7
)
=
14
5
÷
2
35

=49;

(6)
1
4
÷
5
6
×
5
12

=
3
10
×
5
12

=
1
8
;

(7)(
5
14
+
5
7
)÷
6
7

=
15
14
÷
6
7

=1
1
4
;

(8)
1
3
×
(
4
5
-
5
7
)
=
1
3
×
3
35

=
1
35
.
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