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计算下面各题.(能简便的要写出主要简便过程)(1)(6.38+5.2÷0.8)÷46(2)(12-9.5)×(8÷12.5)(3)2528-(27+514)(4)411+25+711+35.

题目详情
计算下面各题.(能简便的要写出主要简便过程)
(1)(6.38+5.2÷0.8)÷46           
(2)(12-9.5)×(8÷12.5)
(3)
25
28
-(
2
7
+
5
14

(4)
4
11
+
2
5
+
7
11
+
3
5



25
28
-(
2
7
+
5
14

(4)
4
11
+
2
5
+
7
11
+
3
5
25
28
25252828
2
7
+
5
14

(4)
4
11
+
2
5
+
7
11
+
3
5
2
7
2277
5
14

(4)
4
11
+
2
5
+
7
11
+
3
5
5
14
551414
4
11
+
2
5
+
7
11
+
3
5
4
11
441111
2
5
+
7
11
+
3
5
2
5
2255
7
11
+
3
5
7
11
771111
3
5
3
5
3355
▼优质解答
答案和解析
(1)(6.38+5.2÷0.8)÷46
=(6.38+6.5)÷46
=12.88÷46
=0.28;

(2)(12-9.5)×(8÷12.5)
=2.5×0.64
=1.6;

(3)
25
28
-(
2
7
+
5
14

=
25
28
-
9
14

=
1
4


(4)
4
11
+
2
5
+
7
11
+
3
5

=(
4
11
+
7
11
)+(
2
5
+
3
5

=1+1
=2.
25
28
252525282828-(
2
7
+
5
14

=
25
28
-
9
14

=
1
4


(4)
4
11
+
2
5
+
7
11
+
3
5

=(
4
11
+
7
11
)+(
2
5
+
3
5

=1+1
=2.
2
7
222777+
5
14

=
25
28
-
9
14

=
1
4


(4)
4
11
+
2
5
+
7
11
+
3
5

=(
4
11
+
7
11
)+(
2
5
+
3
5

=1+1
=2.
5
14
555141414)
=
25
28
-
9
14

=
1
4


(4)
4
11
+
2
5
+
7
11
+
3
5

=(
4
11
+
7
11
)+(
2
5
+
3
5

=1+1
=2.
25
28
252525282828-
9
14

=
1
4


(4)
4
11
+
2
5
+
7
11
+
3
5

=(
4
11
+
7
11
)+(
2
5
+
3
5

=1+1
=2.
9
14
999141414
=
1
4


(4)
4
11
+
2
5
+
7
11
+
3
5

=(
4
11
+
7
11
)+(
2
5
+
3
5

=1+1
=2.
1
4
111444;

(4)
4
11
+
2
5
+
7
11
+
3
5

=(
4
11
+
7
11
)+(
2
5
+
3
5

=1+1
=2.
4
11
444111111+
2
5
+
7
11
+
3
5

=(
4
11
+
7
11
)+(
2
5
+
3
5

=1+1
=2.
2
5
222555+
7
11
+
3
5

=(
4
11
+
7
11
)+(
2
5
+
3
5

=1+1
=2.
7
11
777111111+
3
5

=(
4
11
+
7
11
)+(
2
5
+
3
5

=1+1
=2.
3
5
333555
=(
4
11
+
7
11
)+(
2
5
+
3
5

=1+1
=2.
4
11
444111111+
7
11
)+(
2
5
+
3
5

=1+1
=2.
7
11
777111111)+(
2
5
+
3
5

=1+1
=2.
2
5
222555+
3
5

=1+1
=2.
3
5
333555)
=1+1
=2.