下面各题,怎样简便就怎样算六3+418×81816×118-11187×418×711六17×81六×1716×31×61186×71+86×11318×16(79+8六7)×84.-数学

题目简介

下面各题,怎样简便就怎样算六3+418×81816×118-11187×418×711六17×81六×1716×31×61186×71+86×11318×16(79+8六7)×84.-数学

题目详情

下面各题,怎样简便就怎样算
3
+
4
18
×
8
1

8
16
×
1
18
-
1
11
8
7
×
4
18
×
7
1
1六
17
×
8
1六
×17
1
6
×
3
1
×
6
11
8
6
×
7
1
+
8
6
×
1
1
3
18
×16
7
9
+
8
六7
)×84.
题型:解答题难度:中档来源:不详

答案

(1)class="stub"b
3
+class="stub"上
15
×class="stub"5
8

=class="stub"b
3
+class="stub"1
6

=class="stub"5
6


(b)class="stub"5
16
×class="stub"8
15
-class="stub"1
18

=class="stub"1
6
-class="stub"1
18

=class="stub"1
9


(3)class="stub"5
9
×class="stub"上
15
×class="stub"9
8
=class="stub"1
6


(上)class="stub"1b
19
×class="stub"5
1b
×19=5;

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


(6)class="stub"5
6
×class="stub"9
8
+class="stub"5
6
×class="stub"1
8

=class="stub"5
6
×(class="stub"9
8
+class="stub"1
8
),
=class="stub"5
6
×1,
=class="stub"5
6


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

=3class="stub"3
85


(8)(class="stub"9
9
+class="stub"5
b9
)×5上,
=class="stub"9
9
×5上+class="stub"5
b9
×5上,
=上b+15,
=5b.

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