下面各题,怎样简便就怎样算.34÷12÷1514(49+215)÷215320÷0.2×23.-数学

题目简介

下面各题,怎样简便就怎样算.34÷12÷1514(49+215)÷215320÷0.2×23.-数学

题目详情

下面各题,怎样简便就怎样算.
3
4
÷
1
2
÷
15
14
4
9
+
2
15
)÷
2
15
3
20
÷0.2×
2
3
题型:解答题难度:中档来源:不详

答案

(1)class="stub"3
4
÷class="stub"1
2
÷class="stub"15
14

=class="stub"3
4
×
class="stub"14
15

=class="stub"3
2
×class="stub"14
15

=1class="stub"2
5


(2)(class="stub"4
9
+class="stub"2
15
)÷class="stub"2
15

=(class="stub"4
9
+class="stub"2
15
)×class="stub"15
2

=class="stub"4
9
×class="stub"15
2
+class="stub"2
15
×class="stub"15
2

=class="stub"10
3
+1,
=4class="stub"1
3


(3)class="stub"3
20
÷0.2×class="stub"2
3

=class="stub"3
20
÷class="stub"1
5
×class="stub"2
3

=class="stub"3
20
×
class="stub"2
3

=class="stub"1
2

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