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用递等式计算(请注意选择适当的方法)20.86-5.63-4.37624÷6-3812.5×32×25%821÷[(35+710)×526](58+712)×2469÷(2.4×13+1.5)

题目详情
用递等式计算(请注意选择适当的方法)
20.86-5.63-4.37             624÷6-3812.5×32×25%              
8
21
÷[(
3
5
+
7
10
)×
5
26
]
5
8
+
7
12
)×24                 
69÷(2.4×
1
3
+1.5)

20.86-5.63-4.37             624÷6-3812.5×32×25%              
8
21
÷[(
3
5
+
7
10
)×
5
26
]
5
8
+
7
12
)×24                 
69÷(2.4×
1
3
+1.5)
20.86-5.63-4.37             624÷6-3812.5×32×25%              
8
21
÷[(
3
5
+
7
10
)×
5
26
]
5
8
+
7
12
)×24                 
69÷(2.4×
1
3
+1.5)
20.86-5.63-4.37             624÷6-3812.5×32×25%               20.86-5.63-4.37             624÷6-3812.5×32×25%              
8
21
÷[(
3
5
+
7
10
)×
5
26
]
5
8
+
7
12
)×24                 
69÷(2.4×
1
3
+1.5)
8
21
÷[(
3
5
+
7
10
)×
5
26
]
8
21
÷[(
3
5
+
7
10
)×
5
26
]
8
21
821882121
3
5
+
7
10
)×
5
26
]
3
5
353355
7
10
)×
5
26
]
7
10
710771010
5
26
]
5
26
526552626(
5
8
+
7
12
)×24                 
5
8
+
7
12
)×24                 
5
8
585588
7
12
)×24                 
7
12
71277121269÷(2.4×
1
3
+1.5)
1
3
+1.5)
1
3
131133
▼优质解答
答案和解析
(1)20.86-5.63-4.37
=20.86-(5.63+4.37)
=20.86-10
=10.86;

(2)624÷6-38
=104-38
=66;

(3)12.5×32×25%
=12.5×(4×8)×25%
=(12.5×8)×(4×25%)
=100×1
=100;

(4)
8
21
÷[(
3
5
+
7
10
)×
5
26
]
=
8
21
÷[
13
10
×
5
26
]
=
8
21
÷
1
4

=
32
21


(5)(
5
8
+
7
12
)×24
=
5
8
×24+
7
12
×24
=15+14
=29;

(6)69÷(2.4×
1
3
+1.5)
=69÷(0.8+1.5)
=69÷2.3
=30.
8
21
821888212121÷[(
3
5
+
7
10
)×
5
26
]
=
8
21
÷[
13
10
×
5
26
]
=
8
21
÷
1
4

=
32
21


(5)(
5
8
+
7
12
)×24
=
5
8
×24+
7
12
×24
=15+14
=29;

(6)69÷(2.4×
1
3
+1.5)
=69÷(0.8+1.5)
=69÷2.3
=30.
3
5
35333555+
7
10
)×
5
26
]
=
8
21
÷[
13
10
×
5
26
]
=
8
21
÷
1
4

=
32
21


(5)(
5
8
+
7
12
)×24
=
5
8
×24+
7
12
×24
=15+14
=29;

(6)69÷(2.4×
1
3
+1.5)
=69÷(0.8+1.5)
=69÷2.3
=30.
7
10
710777101010)×
5
26
]
=
8
21
÷[
13
10
×
5
26
]
=
8
21
÷
1
4

=
32
21


(5)(
5
8
+
7
12
)×24
=
5
8
×24+
7
12
×24
=15+14
=29;

(6)69÷(2.4×
1
3
+1.5)
=69÷(0.8+1.5)
=69÷2.3
=30.
5
26
526555262626]
=
8
21
÷[
13
10
×
5
26
]
=
8
21
÷
1
4

=
32
21


(5)(
5
8
+
7
12
)×24
=
5
8
×24+
7
12
×24
=15+14
=29;

(6)69÷(2.4×
1
3
+1.5)
=69÷(0.8+1.5)
=69÷2.3
=30.
8
21
821888212121÷[
13
10
×
5
26
]
=
8
21
÷
1
4

=
32
21


(5)(
5
8
+
7
12
)×24
=
5
8
×24+
7
12
×24
=15+14
=29;

(6)69÷(2.4×
1
3
+1.5)
=69÷(0.8+1.5)
=69÷2.3
=30.
13
10
1310131313101010×
5
26
]
=
8
21
÷
1
4

=
32
21


(5)(
5
8
+
7
12
)×24
=
5
8
×24+
7
12
×24
=15+14
=29;

(6)69÷(2.4×
1
3
+1.5)
=69÷(0.8+1.5)
=69÷2.3
=30.
5
26
526555262626]
=
8
21
÷
1
4

=
32
21


(5)(
5
8
+
7
12
)×24
=
5
8
×24+
7
12
×24
=15+14
=29;

(6)69÷(2.4×
1
3
+1.5)
=69÷(0.8+1.5)
=69÷2.3
=30.
8
21
821888212121÷
1
4

=
32
21


(5)(
5
8
+
7
12
)×24
=
5
8
×24+
7
12
×24
=15+14
=29;

(6)69÷(2.4×
1
3
+1.5)
=69÷(0.8+1.5)
=69÷2.3
=30.
1
4
14111444
=
32
21


(5)(
5
8
+
7
12
)×24
=
5
8
×24+
7
12
×24
=15+14
=29;

(6)69÷(2.4×
1
3
+1.5)
=69÷(0.8+1.5)
=69÷2.3
=30.
32
21
3221323232212121;

(5)(
5
8
+
7
12
)×24
=
5
8
×24+
7
12
×24
=15+14
=29;

(6)69÷(2.4×
1
3
+1.5)
=69÷(0.8+1.5)
=69÷2.3
=30.
5
8
58555888+
7
12
)×24
=
5
8
×24+
7
12
×24
=15+14
=29;

(6)69÷(2.4×
1
3
+1.5)
=69÷(0.8+1.5)
=69÷2.3
=30.
7
12
712777121212)×24
=
5
8
×24+
7
12
×24
=15+14
=29;

(6)69÷(2.4×
1
3
+1.5)
=69÷(0.8+1.5)
=69÷2.3
=30.
5
8
58555888×24+
7
12
×24
=15+14
=29;

(6)69÷(2.4×
1
3
+1.5)
=69÷(0.8+1.5)
=69÷2.3
=30.
7
12
712777121212×24
=15+14
=29;

(6)69÷(2.4×
1
3
+1.5)
=69÷(0.8+1.5)
=69÷2.3
=30.
1
3
13111333+1.5)
=69÷(0.8+1.5)
=69÷2.3
=30.