题目内容

怎样简便就怎样算.
1
4
+
1
5
)×
4
9
5
8
×
1
4
+
3
4
×
5
8
48×(
7
12
+
1
6
)÷
2
3
(1-
3
4
×
4
5
)÷
8
15
4
25
×99+
4
25
7
9
-
1
4
)×36.
(1)(
1
4
+
1
5
)×
4
9

=
9
20
×
4
9

=
1
5


(2)
5
8
×
1
4
+
3
4
×
5
8

=
5
8
×(
1
4
+
3
4
),
=
5
8
×1,
=
5
8


(3)48×(
7
12
+
1
6
)÷
2
3

=(48×
7
12
+48×
1
6
)÷
2
3

=(28+8)÷
2
3

=36÷
2
3

=54;

(4)(1-
3
4
×
4
5
)÷
8
15

=(1-
3
5
)÷
8
15

=
2
5
÷
8
15

=
3
4


(5)
4
25
×99+
4
25

=
4
25
×(99+1),
=
4
25
×100,
=16;

(6)(
7
9
-
1
4
)×36,
=
7
9
×36-
1
4
×36,
=28-9,
=19;
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