已知[(914-735)÷234]÷[(13+□)×157]=2125,那么□=______.-数学

题目简介

已知[(914-735)÷234]÷[(13+□)×157]=2125,那么□=______.-数学

题目详情

已知[(9
1
4
-7
3
5
)÷2
3
4
]÷[(
1
3
+□)×1
5
7
]=
21
25
,那么□=______.
题型:填空题难度:中档来源:不详

答案

[(9class="stub"1
4
-7class="stub"3
5
)÷2class="stub"3
4
]÷[(class="stub"1
3
+□)×1class="stub"5
7
]=class="stub"21
25

[1class="stub"13
20
÷2class="stub"3
4
]÷[(class="stub"1
3
+□)×1class="stub"5
7
]=class="stub"21
25

                    class="stub"3
5
÷[(class="stub"1
3
+□)×1class="stub"5
7
]=class="stub"21
25

                          (class="stub"1
3
+□)×1class="stub"5
7
=class="stub"3
5
÷class="stub"21
25

                          (class="stub"1
3
+□)×1class="stub"5
7
=class="stub"5
7

                                  class="stub"1
3
+□=class="stub"5
12

□=class="stub"1
12

故答案为:class="stub"1
12

更多内容推荐