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(1)(927+729)÷(57+59)(2)(1+13+25+16)×53(3)43-712+920-1130+1342-1556(4)11×5+15×9+19×13+113×17+117×21.

编辑:chaxungu时间:2026-04-27 13:18:23分类:小学数学题库

(1)(9
2
7
+7
2
9
)÷(
5
7
+
5
9
)
(2)(1+
1
3
+
2
5
+
1
6
)×
5
3

(3)
4
3
-
7
12
+
9
20
-
11
30
+
13
42
-
15
56

(4)
1
1×5
+
1
5×9
+
1
9×13
+
1
13×17
+
1
17×21
.(1)(9
2
7
+7
2
9
)÷(
5
7
+
5
9
),
=(9
18
63
+7
14
63
)÷(
45
63
+
35
63
),
=16
32
63
÷
80
63
,
=
1040
63
×
63
80
,
=13;

(2)(1+
1
3
+
2
5
+
1
6
)×
5
3
,
=
5
3
+
5
9
+
2
3
+
5
18
,
=
30
18
+
10
18
+
12
18
+
5
18
,
=
57
18
,
=3
1
6
;

(3)
4
3
-
7
12
+
9
20
-
11
30
+
13
42
-
15
56
,
=
80
60
-
35
60
+
27
60
-
22
60
+
13
42
-
15
56
,
=
5
6
+
13
42
-
15
56
,
=
35
42
+
13
42
-
15
56
,
=
8
7
-
15
56

=
64
56
-
15
56
,
=
7
8
;

(4)
1
1×5
+
1
5×9
+
1
9×13
+
1
13×17
+
1
17×21
,
=(1-
1
5
+
1
5
-
1
9
+
1
9
-
1
13
+
1
13
-
1
17
+
1
17
-
1
21
)÷4,
=(1-
1
21
)×
1
4
,
=
20
21
×
1
4
,
=
5
21
.