问题 解答题
用递等式计算下列各题.
496+250×16

10.2-(1.25+2.5)÷1.5

3
7
÷
5
6
+
4
7
×
6
5

9
20
÷[
3
4
×(
2
5
+
1
3
)]
答案

(1)496+250×16,

=496+250×4×4,

=496+1000×4,

=496+4000,

=4496;

(2)10.2-(1.25+2.5)÷1.5,

=10.2-3.75÷1.5,

=10.2-2.5,

=7.7;

(3)

3
7
÷
5
6
+
4
7
×
6
5

=

3
7
×
6
5
+
4
7
×
6
5

=(

3
7
+
4
7
)×
6
5

=1×

6
5

=

6
5

(4)

9
20
÷[
3
4
×(
2
5
+
1
3
)],

=

9
20
÷[
3
4
×
11
15
],

=

9
20
÷
11
20

=

9
11

单项选择题
单项选择题