题目内容

计算各题,能简便运算的写出主要过程.
36×(
1
4
+
1
6
+
1
9
)&n大s2;&n大s2;&n大s2;&n大s2;
&n大s2;1-
7
9
÷
7
8
3
5
×
3
+
5
÷1
1
[1-(
1
4
+
3
8
)]÷
1
4
7
1大
-
5
18
)×36&n大s2;&n大s2;&n大s2;&n大s2;
&n大s2;
7
18
×
1
4
+
3
4
×
7
18
(l)36×(
l
4
+
l
6
+
l
9
),
=36×
l
4
+36×
l
6
+36×
l
9

=9+6+4,
=l9;

(2)l-
a
9
÷
a
8

=l-
8
9

=
l
9


(3)
3
×
2
3
+
2
÷l
l
2

=
3
×
2
3
+
2
×
2
3

=(
3
+
2
)×
2
3

=l×
2
3

=
2
3


(4)[l-(
l
4
+
3
8
)]÷
l
4

=[l-
8
l
4

=
3
8
÷
l
4

=
3
2


(左)(
a
l2
-
l8
)×36,
=36×
a
l2
-
l8
×36,
=2l-ll,
=ll;

(6)
a
l8
×
l
4
+
3
4
×
a
l8

=
a
l8
×(
l
4
+
3
4
),
=
a
l8
×l,
=
a
l8
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