下面的题怎样简便就怎样算81.2-11÷7-17×3913÷8+18×7136696÷62-6.5×10.6[34-(56-23)]÷54.-数学

题目简介

下面的题怎样简便就怎样算81.2-11÷7-17×3913÷8+18×7136696÷62-6.5×10.6[34-(56-23)]÷54.-数学

题目详情

下面的题怎样简便就怎样算
81.2-11÷7-
1
7
×3
9
13
÷8+
1
8
×
7
13

6696÷62-6.5×10.6
[
3
4
-(
5
6
-
2
3
)]÷
5
4
题型:解答题难度:中档来源:不详

答案

(1)81.2-11÷7-class="stub"1
7
×3,
=81.2-class="stub"11
7
-class="stub"3
7

=81.2-(class="stub"11
7
+class="stub"3
7
),
=81.2-2,
=79.2;

(2)class="stub"9
13
÷8+class="stub"1
8
×class="stub"7
13

=class="stub"9
13
×class="stub"1
8
+class="stub"1
8
×class="stub"7
13

=(class="stub"9
13
+class="stub"7
13
)×class="stub"1
8

=class="stub"16
13
×class="stub"1
8

=class="stub"2
13


(3)6696÷62-6.5×10.6,
=108-68.9,
=39.1;

(4)[class="stub"3
4
-(class="stub"5
6
-class="stub"2
3
)]÷class="stub"5
4

=[class="stub"3
4
-class="stub"1
6
class="stub"5
4

=class="stub"7
12
×class="stub"4
5

=class="stub"7
15

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