题目内容

计算.(能简算的要用简便方法计算.)
5
12
×
7
25
×
3
14
7
9
÷
1
2
÷
35
36
1
14
×(
7
8
+7)
3
5
×
8
9
÷
5
8
5
6
×
1
4
+
5
6
×
3
4
96×
4
5
-36÷
5
4
+
4
5
×40
4
9
÷[(
1
3
-
1
9
)×2]
3
4
+
7
9
+
1
4
-
4
9
2
7
×
5
9
÷
2
7
×
5
9
(
11
12
-
3
7
)-(
4
7
-
7
12
)
3
5
×0.25+
3
5
×
3
4
.
(1)
5
12
×
7
25
×
3
14
,
=
7
60
×
3
14
,
=
1
40
;

(2)
7
9
÷
1
2
÷
35
36
,
=
14
9
×
36
35
,
=
8
5
;

(3)
1
14
×(
7
8
+7),
=
1
14
×
7
8
+7×
1
14
,
=
1
16
+
1
2
,
=
9
16
;

(4)
3
5
×
8
9
÷
5
8
,
=
8
15
×
8
5
,
=
64
75
;

(5)
5
6
×
1
4
+
5
6
×
3
4
,
=
5
6
×(
1
4
+
3
4
),
=
5
6
×1,
=
5
6
;

(6)96×
4
5
-36÷
5
4
+
4
5
×40,
=96×
4
5
-36×
4
5
+
4
5
×40,
=(96-36+40)×
4
5
,
=100×
4
5
,
=80;

(7)
4
9
÷[(
1
3
-
1
9
)×2],
=
4
9
÷[
2
9
×2],
=
4
9
÷
4
9
,
=1;

(8)
3
4
+
7
9
+
1
4
-
4
9
,
=(
3
4
+
1
4
)+(
7
9
-
4
9
),
=1+
1
3
,
=1
1
3
;

(9)
2
7
×
5
9
÷
2
7
×
5
9
,
=
2
7
×
5
9
×
7
2
×
5
9
,
=(
2
7
×
7
2
)×(
5
9
×
5
9
),
=1×
25
81
,
=
25
81
;

(10)(
11
12
-
3
7
)-(
4
7
-
7
12
),
=
11
12
-
3
7
-
4
7
+
7
12
,
=(
11
12
+
7
12
)-(
3
7
+
4
7
),
=
3
2
-1,
=
1
2
;

(11)
3
5
×0.25+
3
5
×
3
4
,
=
3
5
×(0.25+
3
4
),
=
3
5
×1,
=
3
5
.
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