题目内容

计算.
11
12
-(
1
4
+
3
8
5
6

(1.6×
5
8
+3.6÷
3
4
4
29

③(1-
1
2×2
)×(1-
1
3×3
)
×…×(1-
1
10×10
)
11
12
-(
1
4
+
3
8
5
6

=
11
12
-
5
8
÷
5
6

=
11
12
-
3
4

=
1
6


(1.6×
5
8
+3.6÷
3
4
4
29

=(1+4.8)×
4
29

=5.8×
4
29

=0.8;

③(1-
1
2×2
)×(1-
1
3×3
)
×…×(1-
1
10×10
)

=(1+
1
2
)×(1-
1
2
)×(1+
1
3
)×(1-
1
3
)×…×(1+
1
10
)×(1-
1
10
),
=
3
2
×
1
2
×
4
3
×
2
3
×…×
11
10
×
9
10

=
1
2
×(
3
2
×
2
3
)×(
4
3
×
3
4
)×…×(
10
9
×
9
10
)×
11
10

=
1
2
×
11
10

=
11
20
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