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怎样简便就怎样算122×11+3939÷13(10.68×56+56×8.52)÷8534×25+14÷12523+(47+12)×7251117+813-(1117-513)[74-(716+0.25)]×89.

题目详情
怎样简便就怎样算
122×11+3939÷13
(10.68×
5
6
+
5
6
×8.52)÷
8
5
3
4
×25+
1
4
÷
1
25
2
3
+(
4
7
+
1
2
)×
7
25
11
17
+
8
13
-(
11
17
-
5
13
[
7
4
-(
7
16
+0.25)]×
8
9
▼优质解答
答案和解析
(1)122×11+3939÷13
=1342+303
=1645;

(2)(10.68×
5
6
+
5
6
×8.52)÷
8
5

=(10.68+8.52)×
5
6
÷
8
5

=19.2×
5
6
×
5
8

=10;

(3)
3
4
×25+
1
4
÷
1
25

=
3
4
×25+
1
4
×25
=(
3
4
+
1
4
)×25
=25;

(4)
2
3
+(
4
7
+
1
2
)×
7
25

=
2
3
+
15
14
×
7
25

=
2
3
+
3
10

=
29
30


(5)
11
17
+
8
13
-(
11
17
-
5
13

=
11
17
+
8
13
-
11
17
+
5
13

=
11
17
-
11
17
+
8
13
+
5
13

=1;

(6)[
7
4
-(
7
16
+0.25)]×
8
9

=[
7
4
-
11
16
8
9

=
17
16
×
8
9

=
17
18