问题 解答题
(1)[9
2008
2009
-(8-
1
2009
)]÷2×
1
2

(2)
4.75×
8
19
+14
2
3
×1.1
8.68-0.36+4.32-1.64
答案

(1)[9

2008
2009
-(8-
1
2009
)]÷2×
1
2

=[9+

2008
2009
-8+
1
2009
)]÷2×
1
2

=[(9-8)+(

2008
2009
+
1
2009
)]÷2×
1
2

=[1+1]÷2×

1
2

=2÷2×

1
2

=1×

1
2

=

1
2

(2)

4.75×
8
19
+14
2
3
×1.1
8.68-0.36+4.32-1.64

=

19
4
×
8
19
+
44
3
×
11
10
(8.68+4.32)-(0.36+1.64)

=

2+
242
15
13-2

=

272
15
11

=

272
165

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