早教吧 育儿知识 作业答案 考试题库 百科 知识分享

用简便方法计算①537-449-659+747②57÷52+307×0.4③(59+45-715)×45④2012×20112013.

题目详情
用简便方法计算
①5
3
7
-4
4
9
-6
5
9
+7
4
7
       
5
7
÷
5
2
+
30
7
×0.4
③(
5
9
+
4
5
-
7
15
)×45                 
④2012×
2011
2013

3
7
-4
4
9
-6
5
9
+7
4
7
       
5
7
÷
5
2
+
30
7
×0.4
③(
5
9
+
4
5
-
7
15
)×45                 
④2012×
2011
2013
3
7
3377
4
9
-6
5
9
+7
4
7
       
5
7
÷
5
2
+
30
7
×0.4
③(
5
9
+
4
5
-
7
15
)×45                 
④2012×
2011
2013
4
9
4499
5
9
+7
4
7
       
5
7
÷
5
2
+
30
7
×0.4
③(
5
9
+
4
5
-
7
15
)×45                 
④2012×
2011
2013
5
9
5599
4
7
       
5
7
÷
5
2
+
30
7
×0.4
③(
5
9
+
4
5
-
7
15
)×45                 
④2012×
2011
2013
4
7
4477
5
7
÷
5
2
+
30
7
×0.4
③(
5
9
+
4
5
-
7
15
)×45                 
④2012×
2011
2013
5
7
5577
5
2
+
30
7
×0.4
③(
5
9
+
4
5
-
7
15
)×45                 
④2012×
2011
2013
5
2
5522
30
7
×0.4
③(
5
9
+
4
5
-
7
15
)×45                 
④2012×
2011
2013
30
7
303077
5
9
+
4
5
-
7
15
)×45                 
④2012×
2011
2013
5
9
5599
4
5
-
7
15
)×45                 
④2012×
2011
2013
4
5
4455
7
15
)×45                 
④2012×
2011
2013
7
15
771515
2011
2013
2011
2013
2011201120132013
▼优质解答
答案和解析
(1)5
3
7
-4
4
9
-6
5
9
+7
4
7

=5
3
7
+7
4
7
-(4
4
9
+6
5
9
),
=13-11,
=2;

(2)
5
7
÷
5
2
+
30
7
×0.4,
=(
5
7
+
30
7
)×
2
5

=5×
2
5

=2;

(3)(
5
9
+
4
5
-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
3
7
333777-4
4
9
-6
5
9
+7
4
7

=5
3
7
+7
4
7
-(4
4
9
+6
5
9
),
=13-11,
=2;

(2)
5
7
÷
5
2
+
30
7
×0.4,
=(
5
7
+
30
7
)×
2
5

=5×
2
5

=2;

(3)(
5
9
+
4
5
-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
4
9
444999-6
5
9
+7
4
7

=5
3
7
+7
4
7
-(4
4
9
+6
5
9
),
=13-11,
=2;

(2)
5
7
÷
5
2
+
30
7
×0.4,
=(
5
7
+
30
7
)×
2
5

=5×
2
5

=2;

(3)(
5
9
+
4
5
-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
5
9
555999+7
4
7

=5
3
7
+7
4
7
-(4
4
9
+6
5
9
),
=13-11,
=2;

(2)
5
7
÷
5
2
+
30
7
×0.4,
=(
5
7
+
30
7
)×
2
5

=5×
2
5

=2;

(3)(
5
9
+
4
5
-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
4
7
444777,
=5
3
7
+7
4
7
-(4
4
9
+6
5
9
),
=13-11,
=2;

(2)
5
7
÷
5
2
+
30
7
×0.4,
=(
5
7
+
30
7
)×
2
5

=5×
2
5

=2;

(3)(
5
9
+
4
5
-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
3
7
333777+7
4
7
-(4
4
9
+6
5
9
),
=13-11,
=2;

(2)
5
7
÷
5
2
+
30
7
×0.4,
=(
5
7
+
30
7
)×
2
5

=5×
2
5

=2;

(3)(
5
9
+
4
5
-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
4
7
444777-(4
4
9
+6
5
9
),
=13-11,
=2;

(2)
5
7
÷
5
2
+
30
7
×0.4,
=(
5
7
+
30
7
)×
2
5

=5×
2
5

=2;

(3)(
5
9
+
4
5
-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
4
9
444999+6
5
9
),
=13-11,
=2;

(2)
5
7
÷
5
2
+
30
7
×0.4,
=(
5
7
+
30
7
)×
2
5

=5×
2
5

=2;

(3)(
5
9
+
4
5
-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
5
9
555999),
=13-11,
=2;

(2)
5
7
÷
5
2
+
30
7
×0.4,
=(
5
7
+
30
7
)×
2
5

=5×
2
5

=2;

(3)(
5
9
+
4
5
-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
5
7
555777÷
5
2
+
30
7
×0.4,
=(
5
7
+
30
7
)×
2
5

=5×
2
5

=2;

(3)(
5
9
+
4
5
-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
5
2
555222+
30
7
×0.4,
=(
5
7
+
30
7
)×
2
5

=5×
2
5

=2;

(3)(
5
9
+
4
5
-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
30
7
303030777×0.4,
=(
5
7
+
30
7
)×
2
5

=5×
2
5

=2;

(3)(
5
9
+
4
5
-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
5
7
555777+
30
7
303030777)×
2
5

=5×
2
5

=2;

(3)(
5
9
+
4
5
-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
2
5
222555,
=5×
2
5

=2;

(3)(
5
9
+
4
5
-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
2
5
222555,
=2;

(3)(
5
9
+
4
5
-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
5
9
555999+
4
5
-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
4
5
444555-
7
15
)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
7
15
777151515)×45,
=
5
9
×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
5
9
555999×45+
4
5
×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
+
4
5
444555×45
7
15
×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
7
15
777151515×45,
=25+36-21,
=40;

(4)2012×
2011
2013

=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
2011
2013
201120112011201320132013,
=(2013-1)×
2011
2013

=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
2011
2013
201120112011201320132013,
=2013×
2011
2013
-1×
2011
2013

=2011
2011
2013

=2000
2
2013
2011
2013
201120112011201320132013-1×
2011
2013

=2011
2011
2013

=2000
2
2013
2011
2013
201120112011201320132013,
=2011
2011
2013

=2000
2
2013
2011
2013
201120112011201320132013,
=2000
2
2013
2
2013
222201320132013.