脱式计算:1-79÷78〔53-(25+34)〕÷345÷57-57×15.-数学

题目简介

脱式计算:1-79÷78〔53-(25+34)〕÷345÷57-57×15.-数学

题目详情

脱式计算:
1-
7
9
÷
7
8

5
3
-(
2
5
+
3
4
)〕÷
3
4

5
7
-
5
7
×
1
5
题型:解答题难度:中档来源:不详

答案


1-class="stub"7
9
÷class="stub"7
8

=1-class="stub"7
9
×class="stub"8
7

=1-class="stub"8
9

=class="stub"1
9

class="stub"5
3
-(class="stub"2
5
+class="stub"3
4
)〕÷class="stub"3
4

=(class="stub"5
3
-class="stub"2
5
-class="stub"3
4
)×class="stub"4
3

=class="stub"5
3
×class="stub"4
3
-class="stub"2
5
×class="stub"4
3
-class="stub"3
4
×class="stub"4
3

=class="stub"20
9
-class="stub"8
15
-1,
=class="stub"55
45
-class="stub"24
45

=class="stub"31
45

class="stub"5
7
-class="stub"5
7
×class="stub"1
5

=5×class="stub"7
5
-class="stub"1
7

=7-class="stub"1
7

=6class="stub"6
7

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