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神机妙算:(能简算的要写出简算过程)(1)(9.6-1012÷1.25)÷(113×75%)(2)14×39+34×25+264×313(3)395÷[32×(1-58)+185](4)[1110+2720÷(3112-1.125)]×923-16(5)0.125×34+18×8.25+12.5%+0.374×48+0.62

题目详情
神机妙算:(能简算的要写出简算过程)
(1)(9.6-10
1
2
÷1.25)÷(1
1
3
×75%)  
(2)
1
4
×39+
3
4
×25+
26
4
×
3
13

(3)
39
5
÷[32×(1-
5
8
)+
18
5
]
(4)[1
1
10
+2
7
20
÷(3
1
12
-1.125)]×
9
23
-
1
6

(5)0.125×
3
4
+
1
8
×8.25+12.5%+0.374×48+0.62×37.4-3.74.
▼优质解答
答案和解析
(1))(9.6-10
1
2
÷1.25)÷(1
1
3
×75%),
=(9.6-8.4)÷1,
=1.2÷1,
=1.2;

(2)
1
4
×39+
3
4
×25+
26
4
×
3
13

=
3
4
×13+
3
4
×25+
3
4
×
26
13

=(13+25+
26
13
)×
3
4

=40×
3
4

=30;

(3)
39
5
÷[32×(1-
5
8
)+
18
5
]
=
39
5
÷[32×
3
8
+
18
5
]
=
39
5
÷[12+
18
5
]
=
39
5
×
5
78

=
1
2


(4))[1
1
10
+2
7
20
÷(3
1
12
-1.125)]×
9
23
-
1
6

=[1
1
10
+
47
20
×
24
47
9
23
-
1
6

=[1
1
10
+
6
5
9
23
-
1
6

=
23
10
×
9
23
1
6

=
9
10
1
6

=
11
15


(5)0.125×
3
4
+
1
8
×8.25+12.5%+0.374×48+0.62×37.4-3.74,
=
1
8
×
3
4
+
1
8
×8.25+
1
8
+3.74×4.8+6.2×3.74-3.74,
=
1
8
×(0.75+8.25+1)+3.74×(4.8+6.2-1),
=
1
8
×10+3.74×10,
=1.25+37.4,
=38.65.