问题 解答题
4.5×4-414÷2375×
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
)].
答案

(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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