问题 解答题
用递等式计算下面各题.
(1)4789-5768÷56×27
(2)(5.1÷0.17+4.2)×4.5
(3)(0.75-
3
16
)×(
2
9
+
1
3

(4)
1
3
÷〔(
2
3
+
1
5
)×
3
13
答案

(1)4789-5768÷56×27,

=4789-103×27,

=4789-2781,

=2008;

(2)(5.1÷0.17+4.2)×4.5,

=(30+4.2)×4.5,

=34.2×4.5,

=153.9;

(3)(0.75-

3
16
)×(
2
9
+
1
3
),

=

9
16
×
5
9

=

5
16

(4)

1
3
÷[(
2
3
+
1
5
)×
3
13
],

=

1
3
÷[
13
15
×
3
13
],

=

1
3
÷
1
5

=

5
3

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