问题 填空题
经过计算得到下列一组等式:
9×9+19
=
100
=10
99×99+199
=
10000
=100
999×999+1999
=
1000000
=1000
,那么
9999×9999+19999
=______.
答案

根据题意,得

9999×9999+19999
=
100000000
=10000.

故答案为:10000

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