题目内容

下面各题,怎样简便就怎样算.
7
8
-
1
6
+
5
6
2
3
×
1
4
+
2
3
×
1
2
2
5
+
3
10
)÷7×
5
8
7
9
÷
11
5
+
2
9
×
5
11
2
5
×75%+
3
4
×
3
5
25×
5
24
(1)
7
8
-
1
6
+
5
6

=
7
8
+(
5
6
-
1
6
),
=
7
8
-
2
3

=
21
24
-
16
24

=
5
24


(2)
2
3
×
1
4
+
2
3
×
1
2

=(
1
4
+
1
2
)×
2
3

=
3
4
×
2
3

=
1
2


(3)(
2
5
+
3
10
)÷7×
5
8

=(
4
10
+
3
10
)×
1
7
×
5
8

=
7
10
×
1
7
×
5
8

=
1
16


(4)
7
9
÷
11
5
+
2
9
×
5
11

=
7
9
×
5
11
+
2
9
×
5
11

=(
7
9
+
2
9
)×
5
11

=1×
5
11

=
5
11


(5)
2
5
×75%+
3
4
×
3
5

=
2
5
×
3
4
+
3
4
×
3
5

=(
2
5
+
3
5
)×
3
4

=1×
3
4

=
3
4


(6)25×
5
24

=(24+1)×
5
24

=24×
5
24
+
5
24

=5+
5
24

=5
5
24
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