Đáp án:
1. `12^7` : `6^7` = `(12:6)^7`
= `2^7`
2. `27^5` : `81^3`=`3^3^5` : `3 ^4^3`
= `3^15` : `3^12`
=`3^(15-12)`
=` 3^3`
3. `18^3 : ` 9^3`
= `(18:9)^3`
=`2^3`
4. `125^3` : `25^4`
`5^3^3` : `5^2^4`
=`5^9` : `5^8`
= `5^(9-8)`
= `5`
mong được ctlhn ạ