题目内容

找窍门,怎样算简便就怎样算.
(1)
5
6
×
6
5
-
9
10
÷
9
5

(2)4-
5
11
-
7
11

(3)3
1
5
×[(1
2
3
+
1
5
)×2
1
7
]
(4)[
3
4
-0÷(
1
7
+
2
13
)]×1
1
3

(5)20
1
100
×83+1.7×200
1
10

(6)
4
5
÷[(
5
8
-
1
2
)÷
5
8
].
(1)
5
6
×
6
5
-
9
10
÷
9
5

=1-
9
10
×
5
9

=1-
1
2

=
1
2


(2)4-
5
11
-
7
11

=4-(
5
11
+
7
11
),
=4-1,
=3;

(3)3
1
5
×[(1
2
3
+
1
5
)×2
1
7
]
=
16
5
×[(
5
3
+
1
5
)×
15
7
],
=
16
5
×[
5
3
×
15
7
+
1
5
×
15
7
],
=
16
5
×[
25
7
+
3
7
],
=
16
5
×4,
=12
4
5


(4)[
3
4
-0÷(
1
7
+
2
13
)]×1
1
3

=[
3
4
-0
4
3

=
3
4
×
4
3

=1;

(5)20
1
100
×83+1.7×200
1
10

=20.01×83+1.7×200.1
=200.1×8.3+1.7×200.1,
=(8.3+1.7)×200.1,
=10×200.1,
=2001;

(6)
4
5
÷[(
5
8
-
1
2
)÷
5
8
]
=
4
5
÷[(
5
8
-
1
2
)×
8
5
],
=
4
5
÷[
5
8
×
8
5
-
1
2
×
8
5
],
=
4
5
÷[1-
4
5
],
=
4
5
÷
1
5

=4.
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