题目内容

怎样算简便就怎样算.
4
9
×
1
5
÷
4
5
4-
5
11
-
6
11
1
8
×58+42÷8;
36×(
2
3
+
1
6
-
3
4
);
(15-14×
4
7
)×
8
21
4
5
÷
5
8
-
1
2
÷
5
8
(1)
4
9
×
1
5
÷
4
5

=
4
9
×
1
5
×
5
4

=
1
9


(2)4-
5
11
-
6
11

=4-(
5
11
+
6
11
),
=4-1,
=3;

(3)
1
8
×58+42÷8
=
1
8
×58+42×
1
8

=(58+42)×
1
8

=100×
1
8

=12.5;

(4)36×(
2
3
+
1
6
-
3
4

=36×
2
3
+36×
1
6
-36×
3
4

=24+6-27,
=3;

(5)(15-14×
4
7
)×
8
21

=(15-8)×
8
21

=7×
8
21

=
8
3


(6)
4
5
÷
5
8
-
1
2
÷
5
8

=
4
5
×
8
5
-
1
2
×
8
5

=(
4
5
-
1
2
)×
8
5

=
3
10
×
8
5

=
12
25
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