题目内容

下面各题,怎样简便就怎样算
3
+
4
18
×
8
1

8
16
×
1
18
-
1
11
8
7
×
4
18
×
7
1
1六
17
×
8
1六
×17
1
6
×
3
1
×
6
11
8
6
×
7
1
+
8
6
×
1
1
3
18
×16
7
9
+
8
六7
)×84.
(1)
b
3
+
15
×
5
8

=
b
3
+
1
6

=
5
6


(b)
5
16
×
8
15
-
1
18

=
1
6
-
1
18

=
1
9


(3)
5
9
×
15
×
9
8
=
1
6


(上)
1b
19
×
5
1b
×19=5;

(5)
1
6
×
3
8
×
6
11
=
3
88


(6)
5
6
×
9
8
+
5
6
×
1
8

=
5
6
×(
9
8
+
1
8
),
=
5
6
×1,
=
5
6


(9)
3
85
×86,
=
3
85
×(85+1),
=
3
85
×85+
3
85

=3
3
85


(8)(
9
9
+
5
b9
)×5上,
=
9
9
×5上+
5
b9
×5上,
=上b+15,
=5b.
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