递等式计算,能简便的用简便方法.59×(34÷110)87×386[1-(14×38)]÷14.-数学

题目简介

递等式计算,能简便的用简便方法.59×(34÷110)87×386[1-(14×38)]÷14.-数学

题目详情

递等式计算,能简便的用简便方法.
5
9
×(
3
4
÷
1
10
) 
87×
3
86

[1-(
1
4
×
3
8
)]÷
1
4
题型:解答题难度:中档来源:不详

答案

(1)class="stub"5
9
×(class="stub"3
4
÷class="stub"1
10

=class="stub"5
9
×class="stub"15
2

=class="stub"25
6


(2)87×class="stub"3
86

=(86+1)×class="stub"3
86

=86×class="stub"3
86
+1×class="stub"3
86

=3+class="stub"3
86

=3class="stub"3
86


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

=[1-class="stub"3
32
class="stub"1
4

=class="stub"29
32
÷class="stub"1
4

=class="stub"29
8

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