下面各题,怎样算简便就怎样算:13÷(23-25)×351215×(56+34)+4579÷115+29×511.-数学

题目简介

下面各题,怎样算简便就怎样算:13÷(23-25)×351215×(56+34)+4579÷115+29×511.-数学

题目详情

下面各题,怎样算简便就怎样算:
1
3
÷(
2
3
-
2
5
)×
3
5

12
15
×(
5
6
+
3
4
)+
4
5

7
9
÷
11
5
+
2
9
×
5
11
题型:解答题难度:中档来源:不详

答案

(1)class="stub"1
3
÷(class="stub"2
3
-class="stub"2
5
)×class="stub"3
5

=class="stub"1
3
÷class="stub"4
15
×class="stub"3
5

=class="stub"1
3
×class="stub"15
4
×class="stub"3
5

=class="stub"3
4


(2)class="stub"12
15
×(class="stub"5
6
+class="stub"3
4
)+class="stub"4
5

=class="stub"12
15
×class="stub"19
12
+class="stub"4
5

=class="stub"19
15
+class="stub"4
5

=class="stub"31
15


(3)class="stub"7
9
÷class="stub"11
5
+class="stub"2
9
×class="stub"5
11

=class="stub"7
9
×class="stub"5
11
+class="stub"2
9
×class="stub"5
11

=(class="stub"7
9
+class="stub"2
9
)×class="stub"5
11

=1×class="stub"5
11

=class="stub"5
11

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