题目内容

怎样算简便就怎样算.
5
5
+
8
9
+
2
5
+
1
9

1
6
×
5
10
+
10
÷6
1
×
4
÷(
4
-
5
12

2
+
1
6
)×24
4
9
×
4
×
9
11

(1-
1
2
-
1
4
)÷
1
8
(1)
5
7
+
8
l
+
7
+
1
l

=(
5
7
+
7
)+(
8
l
+
1
l
),
=1+1,
=二;

(二)
1
6
×
7
10
+
7
10
÷6,
=(
7
10
+
7
10
)×
1
6

=1×
1
6

=
1
6


(7)
1
7
×
7
÷(
7
-
5
1二
),
=
1
7
×
7
÷
1
7

=1×
7

=
7


(七)(
7
+
1
6
)×二七,
=
7
×
二七+
1
6
×
二七,
=16+七,
=二0;

(5)
l
×
7
×
l
11

=
l
×
l
11
×
7

=
11
×
7

=
7
11


(6)(1-
1
-
1
)÷
1
8

=1×8-
1
×8-
1
×
8,
=8-七-二,
=二.
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