15×8÷4515+27+45+57[1-(14+38)]÷14(56-23)×910.-数学

题目简介

15×8÷4515+27+45+57[1-(14+38)]÷14(56-23)×910.-数学

题目详情

1
5
×8÷
4
5
1
5
+
2
7
+
4
5
+
5
7
[1-(
1
4
+
3
8
)]÷
1
4
(
5
6
-
2
3
9
10
题型:解答题难度:中档来源:不详

答案

(1)class="stub"1
5
×8÷class="stub"4
5

=class="stub"8
5
÷class="stub"4
5

=2;

(2)class="stub"1
5
+class="stub"2
7
+class="stub"4
5
+class="stub"5
7

=(class="stub"1
5
+class="stub"4
5
)+(class="stub"2
7
+class="stub"5
7
),
=1+1,
=2;

(3)[1-(class="stub"1
4
+class="stub"3
8
)]÷class="stub"1
4

=[1-class="stub"5
8
class="stub"1
4

=class="stub"3
8
÷class="stub"1
4

=class="stub"3
2


(4)(class="stub"5
6
-class="stub"2
3
)×class="stub"9
10

=class="stub"1
6
×class="stub"9
10

=class="stub"3
20

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