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)(0.75-316)×(29+13)(4)13÷〔(23+15)×313〕-数学

题目简介

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)(0.75-316)×(29+13)(4)13÷〔(23+15)×313〕-数学

题目详情

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
题型:解答题难度:中档来源:不详

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-class="stub"3
16
)×(class="stub"2
9
+class="stub"1
3
),
=class="stub"9
16
×class="stub"5
9

=class="stub"5
16


(4)class="stub"1
3
÷[(class="stub"2
3
+class="stub"1
5
)×class="stub"3
13
],
=class="stub"1
3
÷[class="stub"13
15
×class="stub"3
13
],
=class="stub"1
3
÷class="stub"1
5

=class="stub"5
3

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