问题 解答题
下列各题怎样算简便就怎样算.
2
3
×
5
4
÷
10
9
1
4
-
1
20
)×60
2
3
÷(
1
6
+
1
9
3
4
÷[
5
16
÷(
2
3
-
1
4
)]
1
4
+7.3×25%
答案

(1)

2
3
×
5
4
÷
10
9

=

2
3
×
5
4
×
9
10

=

3
4

(2)(

1
4
-
1
20
)×60,

=

1
4
×60-
1
20
×60,

=15-3,

=12;

(3)

2
3
÷(
1
6
+
1
9
),

=

2
3
÷
5
18

=

12
5

(4)

3
4
÷[
5
16
÷(
2
3
-
1
4
)],

=

3
4
÷[
5
16
÷
5
12
],

=

3
4
÷
3
4

=1;

(5)7×

1
4
+7.3×25%,

=7×0.25+7.3×0.25,

=0.25×(7+7.3),

=0.25×14.3,

=3.575.

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