79÷21×34(1314+57)÷13141÷(25+2.1×23)-数学

题目简介

79÷21×34(1314+57)÷13141÷(25+2.1×23)-数学

题目详情

7
9
÷21×
3
4

13
14
+
5
7
÷
13
14

1÷(
2
5
+2.1×
2
3
题型:解答题难度:中档来源:不详

答案

(1)class="stub"7
9
÷
21×class="stub"3
4

=class="stub"1
27
×class="stub"3
4

=class="stub"1
36


(2)(class="stub"13
14
+class="stub"5
7
÷class="stub"13
14

=class="stub"13
14
×class="stub"14
13
+class="stub"5
7
×class="stub"14
13

=1+class="stub"10
13

=1class="stub"10
13


(3)1÷(class="stub"2
5
+2.1×class="stub"2
3
),
=1÷(class="stub"2
5
+1.4),
=1÷1.8,
=class="stub"5
9

更多内容推荐