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(2008•深圳) 我能很快算出下面的题目相信你也能行.

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(2008•深圳)
我能很快算出下面的题目相信你也能行.
①9
2
5
(2008•深圳) 我能很快算出下面的题目相信你也能行.
①9
2
5-(3
3
7+0.4),
=9
2
5-3
3
7-
2
5,
=(9
2
5-
2
5)-3
3
7,
=9-3
3
7,
=5
4
7;

②7.8×
1
5+2.2×20%,
=7.8×0.2+2.2×0.2,
=(7.8+2.2)×0.2,
=10×0.2,
=2;

③34.7-
7
15+65.3-
8
15,
=(34.7+65.3)-(
7
15+
8
15),
=100-1,
=99;

④(
3
4+
11
6-
13
24)×12,
=
3
4×12+
11
6×12-
13
24×12,
=9+22-6.5,
=24.5;

⑤0.25×32×12.5,
=0.25×4×8×12.5,
=(0.25×4)×(8×12.5),
=1×100,
=100;


7
12×[
3
4-( 
11
20-
1
2)],
=
7
12×[
3
4-( 
11
20-
10
20)],
=