题目内容

4.5×4-414÷23 75×
3
5
+25×
3
5
1
10
-
1
12
+
1
15
)÷
1
60
1
4
-
1
10
÷2)÷
3
10
4
15
×
3
8
+
6
5
÷
8
5
8
25
÷[
4
9
×(2-
7
5
)].
(1)4.5×4-414÷23,
=18-18,
=0;

(2)75×
3
5
+25×
3
5

=(75+25)×
3
5

=100×
3
5

=60;

(3)(
1
10
-
1
12
+
1
15
)÷
1
60

=(
1
10
-
1
12
+
1
15
)×60,
=
1
10
×60-
1
12
×60+
1
15
×60,
=6-5+4,
=5;

(4)(
1
4
-
1
10
÷2)÷
3
10

=(
1
4
-
1
20
)×
10
3

=
1
4
×
10
3
-
1
20
×
10
3

=
5
6
-
1
3

=
1
2


(5)
4
15
×
3
8
+
6
5
÷
8
5
),
=
4
15
×
3
8
+
3
4
),
=
4
15
×
9
8

=
3
10


(6)
8
25
÷[
4
9
×(2-
7
5
)],
=
8
25
÷[
4
9
×
3
5
],
=
8
25
÷
4
15

=
6
5
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