问题
填空题
21×9=189
321×9=2889
4321×9=38889
______×9=______
______×9=______.
答案
通过观察21×9=189
321×9=2889
4321×9=38889
得:54321×9=488889,
654321×9=5888889;
故答案为:54321,488889,654321,5888889.
21×9=189
321×9=2889
4321×9=38889
______×9=______
______×9=______.
通过观察21×9=189
321×9=2889
4321×9=38889
得:54321×9=488889,
654321×9=5888889;
故答案为:54321,488889,654321,5888889.