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89+8153+8425+8825+81353+82009=______．-六年级数学

题目简介

89+8153+8425+8825+81353+82009=______．-六年级数学

题目详情

8
9
+
8
153
+
8
425
+
8
825
+
8
1353
+
8
2009
=______．
题型：解答题难度：中档来源：不详

答案

class="stub"8
9
+class="stub"8
153
+class="stub"8
425
+class="stub"8
825
+class="stub"8
1353
+class="stub"8
2009

=1-class="stub"1
9
+class="stub"8
9×17
+class="stub"8
17×25
+class="stub"8
25×33
+class="stub"8
33×41
+class="stub"8
41×49

=1-class="stub"1
9
+class="stub"1
9
-class="stub"1
17
+class="stub"1
17
-class="stub"1
25
+class="stub"1
25
-class="stub"1
33
+class="stub"1
33
-class="stub"1
41
+class="stub"1
41
-class="stub"1
49

=1-class="stub"1
41

=class="stub"48
49

故答案为：class="stub"48
49
．

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