试题:
1
99
+
2
99
+
3
99
+
4
99
+
5
99
+…+
97
99
+
98
99
=______.

答案:

我来补答
1
99
+
2
99
+
3
99
+
4
99
+
5
99
+…+
97
99
+
98
99

=
(1+98)×98÷2
99

=
99×98÷2
99

=98÷2,
=49.
故答案为:49.
 
 
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这些题目你会做吗?