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用灵活的方法计算下面各题.(25+225)×2589×[34÷(716-0.25)]25%×811+34÷1181115+(23-25)÷14.

题目详情
用灵活的方法计算下面各题.
2
5
+
2
25
)×25                  
 
8
9
×[
3
4
÷(
7
16
-0.25)]
25%×
8
11
+
3
4
÷
11
8
11
15
+(
2
3
-
2
5
)÷
1
4
▼优质解答
答案和解析
(1)(
2
5
+
2
25
)×25,
=
2
5
×25+
2
25
×25,
=10+2,
=12;

(2)
8
9
×[
3
4
÷(
7
16
-0.25)],
=
8
9
×[
3
4
÷
3
16
],
=
8
9
×4,
=3
5
9


(3)25%×
8
11
+
3
4
÷
11
8

=(
3
4
+
1
4
)×
8
11

=1×
8
11

=
8
11


(4)
11
15
+(
2
3
-
2
5
)÷
1
4

=
11
15
+
4
15
÷
1
4

=
11
15
+
16
15

=1
4
5