试题:
计算(能简算的要简算).
(1)(
5
8
+
5
6
)×
4
25
(2)
1
5
×8÷
4
5
(3)
35
64
÷(
1
8
+
3
4
)
(4)
18
25
÷0.6×
2
3
(5)[1-(
1
4
+
3
8
)]÷
1
4
(6)(
2
6
+
1
2
÷
7
6

答案:

我来补答
(1)(
5
8
+
5
6
)×
4
25

=
5
8
×
4
25
+
5
6
×
4
25

=
1
10
+
4
30

=
7
30


(2)
1
5
×8÷
4
5

=
1
5
×8×
5
4

=
1
5
×
5
4
×8,
=
1
4
×8,
=2;

(3)
35
64
÷(
1
8
+
3
4
)

=
35
64
÷
7
8

=
5
8


(4)
18
25
÷0.6×
2
3

=
6
5
×
2
3

=
4
5


(5)[1-(
1
4
+
3
8
)]÷
1
4

=[1-
5
8
]÷
1
4

=
3
8
÷
1
4

=
3
2


(6)(
2
6
+
1
2
÷
7
6

=
5
6
÷
7
6

=
5
7
 
 
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