怎样简便就怎样算.911×715×11357×613+713×571388×87+1388(13+25)×3×5.-数学

题目简介

怎样简便就怎样算.911×715×11357×613+713×571388×87+1388(13+25)×3×5.-数学

题目详情

怎样简便就怎样算.
9
11
×
7
15
×
11
3

5
7
×
6
13
+
7
13
×
5
7

13
88
×87+
13
88

(
1
3
+
2
5
)×3×5
题型:解答题难度:中档来源:不详

答案

(1)class="stub"9
11
×class="stub"7
15
×class="stub"11
3
=class="stub"7
5


(2)class="stub"5
7
×class="stub"6
13
+class="stub"7
13
×class="stub"5
7

=(class="stub"6
13
+class="stub"7
13
)×class="stub"5
7

=1×class="stub"5
7

=class="stub"5
7


(3)class="stub"13
88
×87+class="stub"13
88

=class="stub"13
88
×(87+1),
=class="stub"13
88
×88,
=13;

(4)(class="stub"1
3
+class="stub"2
5
)×3×5,
=class="stub"1
3
×3×5+class="stub"2
5
×3×5,
=5+6,
=11.

更多内容推荐