57×415×781217×512×1716×38×61156×78+56×18385×86(79+527)×54.-数学

题目简介

57×415×781217×512×1716×38×61156×78+56×18385×86(79+527)×54.-数学

题目详情

5
7
×
4
15
×
7
8
12
17
×
5
12
×17
1
6
×
3
8
×
6
11
5
6
×
7
8
+
5
6
×
1
8
3
85
×86
7
9
+
5
27
)×54.
题型:解答题难度:中档来源:不详

答案

(1)class="stub"5
7
×class="stub"4
15
×class="stub"7
8
=class="stub"1
6


(2)class="stub"12
17
×class="stub"5
12
×17=5;

(3)class="stub"1
6
×class="stub"3
8
×class="stub"6
11
=class="stub"3
88


(4)class="stub"5
6
×class="stub"7
8
+class="stub"5
6
×class="stub"1
8

=class="stub"5
6
×(class="stub"7
8
+class="stub"1
8
),
=class="stub"5
6
×1,
=class="stub"5
6


(5)class="stub"3
85
×86,
=class="stub"3
85
×(85+1),
=class="stub"3
85
×85+class="stub"3
85

=3+class="stub"3
85

=3class="stub"3
85


(6)(class="stub"7
9
+class="stub"5
27
)×54,
=class="stub"7
9
×54+class="stub"5
27
×54,
=42+10,
=52.

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