___ ab . 101 = ... ____ abc . 7 . 11 .13 = ...

2 câu trả lời

___ _____

ab . 101 = abab

____ ___ ________

abc . 7 . 11 . 13 = ab . 1001 = abcabc

`overline{ab}×101=overline{abab}`

`overline{abc}.7.11.13=overline{abcabc}`