计算:(1)(6511-51115)÷[227+(12-823)÷1.4](2)[75%-(423-349)×0.25]÷[(256+113)÷212-1415].-数学

题目简介

计算:(1)(6511-51115)÷[227+(12-823)÷1.4](2)[75%-(423-349)×0.25]÷[(256+113)÷212-1415].-数学

题目详情

计算:
(1)(6
5
11
-5
11
15
)÷[2
2
7
+(12-8
2
3
)÷1.4]

(2)[75%-(4
2
3
-3
4
9
)×0.25]÷[(2
5
6
+1
1
3
)÷2
1
2
-1
4
15
]
题型:解答题难度:中档来源:不详

答案

(1)(6class="stub"5
11
-5class="stub"11
15
)÷[2class="stub"2
7
+(12-8class="stub"2
3
)÷1.4]

=class="stub"119
165
÷[2class="stub"2
7
+
3class="stub"1
3
÷
1.4],
=class="stub"119
165
÷
[2class="stub"2
7
+
class="stub"50
21
],
=class="stub"119
165
÷class="stub"98
21

=class="stub"17
110


(2)[75%-(4class="stub"2
3
-3class="stub"4
9
)×0.25]÷[(2class="stub"5
6
+1class="stub"1
3
)÷2class="stub"1
2
-1class="stub"4
15
]

=[75%-1class="stub"2
9
×0.25]÷[4class="stub"1
6
÷2class="stub"1
2
-1class="stub"4
15
],
=[75%-class="stub"11
36
]÷[class="stub"5
3
-1class="stub"4
15
],
=class="stub"4
9
÷
class="stub"2
5

=1class="stub"1
9

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