怎样简便就怎么算.54÷(54÷154)(56+1112)÷1112(58-13×54)×2457×21+27÷121.-数学

题目简介

怎样简便就怎么算.54÷(54÷154)(56+1112)÷1112(58-13×54)×2457×21+27÷121.-数学

题目详情

怎样简便就怎么算.
5
4
÷(
5
4
÷
15
4
)

(
5
6
+
11
12
11
12

(
5
8
-
1
3
×
5
4
)×24

5
7
×21+
2
7
÷
1
21
题型:解答题难度:中档来源:不详

答案

(1)class="stub"5
4
÷(class="stub"5
4
÷class="stub"15
4
)

=class="stub"5
4
÷class="stub"1
3

=class="stub"15
4



(2)(class="stub"5
6
+class="stub"11
12
)÷class="stub"11
12

=(class="stub"5
6
+class="stub"11
12
)×class="stub"12
11

=class="stub"5
6
×class="stub"12
11
+class="stub"11
12
×class="stub"12
11

=class="stub"10
11
+1,
=1class="stub"10
11


(3)(class="stub"5
8
-class="stub"1
3
×class="stub"5
4
)×24

=(class="stub"5
8
-class="stub"5
12
)×24,
=class="stub"5
8
×24-class="stub"5
12
×24,
=15-10,
=5;

(4)class="stub"5
7
×21+class="stub"2
7
÷class="stub"1
21

=class="stub"5
7
×21+class="stub"2
7
×21,
=(class="stub"5
7
+class="stub"2
7
)×21,
=1×21,
=21.

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