3-25÷3510÷(12+15)215÷25+14(35+57)÷537÷78+47÷7878÷19-29÷19.-数学

题目简介

3-25÷3510÷(12+15)215÷25+14(35+57)÷537÷78+47÷7878÷19-29÷19.-数学

题目详情

3-
2
5
÷
3
5
10÷(
1
2
+
1
5
2
15
÷
2
5
+
1
4
(35+
5
7
)÷5
3
7
÷
7
8
+
4
7
÷
7
8
7
8
÷
1
9
-
2
9
÷
1
9
题型:解答题难度:中档来源:不详

答案

(1)3-class="stub"2
5
÷class="stub"3
5

=3-class="stub"2
3

=2class="stub"1
3


(2)10÷(class="stub"1
2
+class="stub"1
5

=10÷class="stub"7
10

=class="stub"100
7


(3)class="stub"2
15
÷class="stub"2
5
+class="stub"1
4

=class="stub"1
3
+class="stub"1
4

=class="stub"7
12


(4)(35+class="stub"5
7
)÷5
=(35+class="stub"5
7
)×class="stub"1
5

=35×class="stub"1
5
+class="stub"5
7
×class="stub"1
5

=7+class="stub"1
7

=7class="stub"1
7


(5)class="stub"3
7
÷class="stub"7
8
+class="stub"4
7
÷class="stub"7
8

=class="stub"3
7
×class="stub"8
7
+class="stub"4
7
×class="stub"8
7

=(class="stub"3
7
+class="stub"4
7
)×class="stub"8
7

=1×class="stub"8
7

=class="stub"8
7


(6)class="stub"7
8
÷class="stub"1
9
-class="stub"2
9
÷class="stub"1
9

=class="stub"63
8
-2
=class="stub"47
8

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