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用递等式计算.(1)201-28.4×6.5(2)(1-122)×(1-132)×(1-142)(3)2.5-(0.65+0.35÷512)(4)0.9-75÷90+16(5)3-67÷(45-0.38)(6)2.5(4+x)-2.5x

题目详情
用递等式计算.
(1)201-28.4×6.5
(2)(1-
1
22
)×(1-
1
32
)×(1-
1
42
(3)2.5-(0.65+0.35÷
5
12
(4)0.9-75÷90+
1
6
(5)3-
6
7
÷(
4
5
-0.38)
(6)2.5(4+x)-2.5x
用递等式计算.
(1)201-28.4×6.5
(2)(1-
1
22
)×(1-
1
32
)×(1-
1
42
(3)2.5-(0.65+0.35÷
5
12
(4)0.9-75÷90+
1
6
(5)3-
6
7
÷(
4
5
-0.38)
(6)2.5(4+x)-2.5x
用递等式计算.
(1)201-28.4×6.5 (2)(1-
1
22
)×(1-
1
32
)×(1-
1
42
(3)2.5-(0.65+0.35÷
5
12
用递等式计算.
(1)201-28.4×6.5
(2)(1-
1
22
)×(1-
1
32
)×(1-
1
42
1
22
)×(1-
1
32
)×(1-
1
42
1
22
11222222222
1
32
)×(1-
1
42
1
32
11323232322
1
42
1
42
11424242422(3)2.5-(0.65+0.35÷
5
12
5
12
5
12
551212 (4)0.9-75÷90+
1
6
(5)3-
6
7
÷(
4
5
-0.38)
(6)2.5(4+x)-2.5x(4)0.9-75÷90+
1
6
1
6
1
6
1166(5)3-
6
7
÷(
4
5
-0.38)
6
7
÷(
4
5
-0.38)
6
7
6677
4
5
-0.38)
4
5
4455(6)2.5(4+x)-2.5x
▼优质解答
答案和解析
(1)201-28.4×6.5,
=201-184.6,
=16.4;

(2)(1-
1
22
)×(1-
1
32
)×(1-
1
42
),
=(1-
1
4
)×(1-
1
9
)×(1-
1
16
),
=
3
4
×
8
9
×
15
16

=
2
3
×
15
16

=
5
8


(3)2.5-(0.65+0.35÷
5
12
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;

(4)0.9-75÷90+
1
6

=0.9-
5
6
+
1
6

=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1
22
1112222222)×(1-
1
32
)×(1-
1
42
),
=(1-
1
4
)×(1-
1
9
)×(1-
1
16
),
=
3
4
×
8
9
×
15
16

=
2
3
×
15
16

=
5
8


(3)2.5-(0.65+0.35÷
5
12
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;

(4)0.9-75÷90+
1
6

=0.9-
5
6
+
1
6

=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1
32
1113232322)×(1-
1
42
),
=(1-
1
4
)×(1-
1
9
)×(1-
1
16
),
=
3
4
×
8
9
×
15
16

=
2
3
×
15
16

=
5
8


(3)2.5-(0.65+0.35÷
5
12
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;

(4)0.9-75÷90+
1
6

=0.9-
5
6
+
1
6

=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1
42
1114242422),
=(1-
1
4
)×(1-
1
9
)×(1-
1
16
),
=
3
4
×
8
9
×
15
16

=
2
3
×
15
16

=
5
8


(3)2.5-(0.65+0.35÷
5
12
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;

(4)0.9-75÷90+
1
6

=0.9-
5
6
+
1
6

=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1
4
111444)×(1-
1
9
)×(1-
1
16
),
=
3
4
×
8
9
×
15
16

=
2
3
×
15
16

=
5
8


(3)2.5-(0.65+0.35÷
5
12
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;

(4)0.9-75÷90+
1
6

=0.9-
5
6
+
1
6

=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1
9
111999)×(1-
1
16
),
=
3
4
×
8
9
×
15
16

=
2
3
×
15
16

=
5
8


(3)2.5-(0.65+0.35÷
5
12
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;

(4)0.9-75÷90+
1
6

=0.9-
5
6
+
1
6

=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1
16
111161616),
=
3
4
×
8
9
×
15
16

=
2
3
×
15
16

=
5
8


(3)2.5-(0.65+0.35÷
5
12
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;

(4)0.9-75÷90+
1
6

=0.9-
5
6
+
1
6

=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
3
4
333444×
8
9
×
15
16

=
2
3
×
15
16

=
5
8


(3)2.5-(0.65+0.35÷
5
12
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;

(4)0.9-75÷90+
1
6

=0.9-
5
6
+
1
6

=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
8
9
888999×
15
16

=
2
3
×
15
16

=
5
8


(3)2.5-(0.65+0.35÷
5
12
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;

(4)0.9-75÷90+
1
6

=0.9-
5
6
+
1
6

=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
15
16
151515161616,
=
2
3
×
15
16

=
5
8


(3)2.5-(0.65+0.35÷
5
12
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;

(4)0.9-75÷90+
1
6

=0.9-
5
6
+
1
6

=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
2
3
222333×
15
16

=
5
8


(3)2.5-(0.65+0.35÷
5
12
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;

(4)0.9-75÷90+
1
6

=0.9-
5
6
+
1
6

=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
15
16
151515161616,
=
5
8


(3)2.5-(0.65+0.35÷
5
12
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;

(4)0.9-75÷90+
1
6

=0.9-
5
6
+
1
6

=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
5
8
555888;

(3)2.5-(0.65+0.35÷
5
12
),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;

(4)0.9-75÷90+
1
6

=0.9-
5
6
+
1
6

=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
5
12
555121212),
=2.5-(0.65+0.84),
=2.5-1.49,
=1.01;

(4)0.9-75÷90+
1
6

=0.9-
5
6
+
1
6

=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1
6
111666,
=0.9-
5
6
+
1
6

=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
5
6
555666+
1
6

=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1
6
111666,
=
9
10
-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
9
10
999101010-(
5
6
-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
5
6
555666-
1
6
),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
1
6
111666),
=
9
10
-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
9
10
999101010-
2
3

=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
2
3
222333,
=
7
30


(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
7
30
777303030;

(5)3-
6
7
÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
6
7
666777÷(
4
5
-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
4
5
444555-0.38),
=3-
6
7
÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
6
7
666777÷
21
50

=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
21
50
212121505050,
=3-
100
49

=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
100
49
100100100494949,
=
47
49


(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+
47
49
474747494949;

(6)2.5×(4+x)-2.5x,
=2.5×4+2.5x-2.5x,
=10+