脱式计算.47.5-(0.6+6.4÷0.32)25×[34-(712-14)]45÷(56×35)-112  ...
脱式计算.47.5-(0.6+6.4÷0.32)25×[34-(712-14)]45÷(56×35)-112168.1÷(4.3×2-0.4)...
脱式计算.47.5-(0.6+6.4÷0.32)25×[34-(712-14)]45÷(56×35)-112 168.1÷(4.3×2-0.4)
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(1)47.5-(0.6+6.4÷0.32)
=47.5-(0.6+20)
=47.5-20.6
=26.9;
(2)
2
5
×[
3
4
-(
7
12
-
1
4
)]
=
2
5
×[
3
4
-
1
3
]
=
2
5
×
5
12
=
1
6
(3)
4
5
÷(
5
6
×
3
5
)-1
1
2
=
4
5
÷
1
2
-1
1
2
=
8
5
-1
1
2
=
1
10
(4)168.1÷(4.3×2-0.4)
=168.1÷(8.6-0.4)
=168.1÷8.2
=20.5
=47.5-(0.6+20)
=47.5-20.6
=26.9;
(2)
2
5
×[
3
4
-(
7
12
-
1
4
)]
=
2
5
×[
3
4
-
1
3
]
=
2
5
×
5
12
=
1
6
(3)
4
5
÷(
5
6
×
3
5
)-1
1
2
=
4
5
÷
1
2
-1
1
2
=
8
5
-1
1
2
=
1
10
(4)168.1÷(4.3×2-0.4)
=168.1÷(8.6-0.4)
=168.1÷8.2
=20.5
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