∵6×7=42,66×67=4422,666×667=444222,6666×6667=44442222,66666×66667=4444422222,
∴
6…6
n个6 ×
6…67
(n-1)个6 =
4…42…2
n个4和n个2 .
故答案为42,4422,444222,44442222,4444422222.
∵6×7=42,66×67=4422,666×667=444222,6666×6667=44442222,66666×66667=4444422222,
∴
6…6
n个6 ×
6…67
(n-1)个6 =
4…42…2
n个4和n个2 .
故答案为42,4422,444222,44442222,4444422222.