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下面各题,怎样算简便就怎样算.(45+14)÷73+710;813÷7+17×513;20-7.8÷(6.2-4.9)

题目详情
下面各题,怎样算简便就怎样算.
4
5
+
1
4
)÷
7
3
+
7
10
;      
8
13
÷7+
1
7
×
5
13
;      20-7.8÷(6.2-4.9)

4
5
+
1
4
)÷
7
3
+
7
10
;      
8
13
÷7+
1
7
×
5
13
;      20-7.8÷(6.2-4.9)
4
5
454455
1
4
)÷
7
3
+
7
10
;      
8
13
÷7+
1
7
×
5
13
;      20-7.8÷(6.2-4.9)
1
4
141144
7
3
+
7
10
;      
8
13
÷7+
1
7
×
5
13
;      20-7.8÷(6.2-4.9)
7
3
737733
7
10
;      
8
13
÷7+
1
7
×
5
13
;      20-7.8÷(6.2-4.9)
7
10
710771010
8
13
÷7+
1
7
×
5
13
;      20-7.8÷(6.2-4.9)
8
13
813881313
1
7
×
5
13
;      20-7.8÷(6.2-4.9)
1
7
171177
5
13
;      20-7.8÷(6.2-4.9)
5
13
513551313
▼优质解答
答案和解析
(1)(
4
5
+
1
4
)÷
7
3
+
7
10

=
21
20
÷
7
3
+
7
10

=
9
20
+
7
10

=
23
20


(2)
8
13
÷7+
1
7
×
5
13

=
8
13
×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
4
5
45444555+
1
4
)÷
7
3
+
7
10

=
21
20
÷
7
3
+
7
10

=
9
20
+
7
10

=
23
20


(2)
8
13
÷7+
1
7
×
5
13

=
8
13
×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1
4
14111444)÷
7
3
+
7
10

=
21
20
÷
7
3
+
7
10

=
9
20
+
7
10

=
23
20


(2)
8
13
÷7+
1
7
×
5
13

=
8
13
×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
7
3
73777333+
7
10

=
21
20
÷
7
3
+
7
10

=
9
20
+
7
10

=
23
20


(2)
8
13
÷7+
1
7
×
5
13

=
8
13
×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
7
10
710777101010
=
21
20
÷
7
3
+
7
10

=
9
20
+
7
10

=
23
20


(2)
8
13
÷7+
1
7
×
5
13

=
8
13
×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
21
20
2120212121202020÷
7
3
+
7
10

=
9
20
+
7
10

=
23
20


(2)
8
13
÷7+
1
7
×
5
13

=
8
13
×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
7
3
73777333+
7
10

=
9
20
+
7
10

=
23
20


(2)
8
13
÷7+
1
7
×
5
13

=
8
13
×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
7
10
710777101010
=
9
20
+
7
10

=
23
20


(2)
8
13
÷7+
1
7
×
5
13

=
8
13
×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
9
20
920999202020+
7
10

=
23
20


(2)
8
13
÷7+
1
7
×
5
13

=
8
13
×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
7
10
710777101010
=
23
20


(2)
8
13
÷7+
1
7
×
5
13

=
8
13
×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
23
20
2320232323202020;

(2)
8
13
÷7+
1
7
×
5
13

=
8
13
×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
8
13
813888131313÷7+
1
7
×
5
13

=
8
13
×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1
7
17111777×
5
13

=
8
13
×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
5
13
513555131313
=
8
13
×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
8
13
813888131313×
1
7
+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1
7
17111777+
1
7
×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1
7
17111777×
5
13

=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
5
13
513555131313
=(
8
13
+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
8
13
813888131313+
5
13
)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
5
13
513555131313)×
1
7

=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1
7
17111777
=1×
1
7

=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1
7
17111777
=
1
7


(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1
7
17111777;

(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.