问题 解答题
计算下面各题.
(1)4768-5768÷56×27
(2)(0.51÷1.7+4.2)×4.5
(3)
5
6
÷
5
8
+
3
8
×
4
9
(4)
7
16
÷[
9
14
×(
5
6
-
4
9
)].
答案

(1)4768-5768÷56×27,

=4768-5768÷56×27,

=4768-103×27,

=4768-2781,

=1987;

(2)(0.51÷1.7+4.2)×4.5,

=(0.3+4.2)×4.5,

=4.5×4.5,

=20.25;

(3)

5
6
÷
5
8
+
3
8
×
4
9

=

4
3
+
1
6

=

3
2

(4)

7
16
÷[
9
14
×(
5
6
-
4
9
)],

=

7
16
÷[
9
14
×
7
18
],

=

7
16
÷
1
4

=

7
4

材料分析题
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