1+316+5112+120+9130+11142=______.-数学

题目简介

1+316+5112+120+9130+11142=______.-数学

题目详情

1+3
1
6
+5
1
12
+
1
20
+9
1
30
+11
1
42
=______.
题型:解答题难度:中档来源:不详

答案

1+3class="stub"1
6
+5class="stub"1
12
+class="stub"1
20
+9class="stub"1
30
+11class="stub"1
42

=(1+3+5+9+11)+(class="stub"1
6
+class="stub"1
12
+class="stub"1
20
+class="stub"1
30
+class="stub"1
42

=29+(class="stub"1
2
-class="stub"1
3
+class="stub"1
3
-class="stub"1
4
+class="stub"1
4
-class="stub"1
5
+class="stub"1
5
-class="stub"1
6
+class="stub"1
6
-class="stub"1
7

=29+(class="stub"1
2
-class="stub"1
7

=29+class="stub"5
14

=29class="stub"5
14

故答案为:29class="stub"5
14

更多内容推荐