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\(\dfrac{2^7\cdot3^8}{6^6}\)
\(=\dfrac{2^7\cdot3^8}{2^6\cdot3^6}\)
\(=2\cdot3^2\)
\(=2\cdot9\)
\(=18\)
![](https://rs.olm.vn/images/avt/0.png?1311)
( − 6 ) . 9 − ( − 9 ) . 8 = ( − 54 ) − ( − 72 ) = ( − 54 ) + 72 = 18.
![](https://rs.olm.vn/images/avt/0.png?1311)
( − 12 ) . 7 − 6 . ( − 5 ) = ( − 84 ) − ( − 30 ) = ( − 84 ) + 30 = − 54.
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9 . ( − 6 ) − ( − 2 ) 3 = ( − 54 ) − ( − 8 ) = ( − 54 ) + 8 = − 46.