问题
解答题
4
|
答案
4
+4911 12
+49911 12
+499911 12
+11 12
,1 3
=(4+49+499+4999)+
×4+11 12
,1 3
=(5-1+50-1+500-1+5000-1)+(
+11 3
),1 3
=5555-4+4,
=5555.
4
|
4
+4911 12
+49911 12
+499911 12
+11 12
,1 3
=(4+49+499+4999)+
×4+11 12
,1 3
=(5-1+50-1+500-1+5000-1)+(
+11 3
),1 3
=5555-4+4,
=5555.