问题 解答题
2010×
2
15
+2010÷15×13
5.75-3.09-1.75
2
3
×
1
4
-
1
6
÷
10
9

1
6
×
[
9
16
÷
7
16
-
1
4
)].
答案

(1)2010×

2
15
+2010÷15×13,

=2010×

2
15
+2010×
13
15

=2010×(

2
15
+
13
15
),

=2010;

(2)5.75-3.09-1.75,

=5.75-1.75-3.09,

=4-3.09,

=0.91;

(3)

2
3
×(
1
4
-
1
6
÷
10
9

=

2
3
×(
1
4
-
1
6
)×
9
10

=

3
5
×
1
4
-
3
5
×
1
6

=

3
20
-
1
10

=

3
20
-
2
20

=

1
20

(4)

1
6
×[
9
16
÷
7
16
-
1
4
)],

=

1
6
×[
9
16
÷(
7
16
-
1
4
)],

=

1
6
×[
9
16
÷
3
16
],

=

1
6
×[
9
16
×
16
3
],

=

1
6
×3,

=

1
2

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