A). 23×41-104×77+23×63 B)19×27+47×81+19×20 C) 27×18+27×83-27 D) 35×23+35×41+64×65 Giúp mik bài với

$a)$ $23×41-104×77+23×63$

$=\left(23×41\right)-\left(104×77\right)+\left(23×63\right)$

$=943-8008+1449$

$=-5616$

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$b)$ $19\times \:27+47\times \:81+19\times \:20$

$=\left(19\times \:27\right)+\left(47\times \:81\right)+\left(19\times \:20\right)$

$=513+3807+380$

$=4700$

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$c)$ $27\times \:18+27\times \:83-27$

$=\left(27\times \:18\right)+\left(27\times \:83\right)-27$

$=486+2241-27$

$=2700$

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$d)$ $35\times \:23+35\times \:41+64\times \:65$

$=\left(35\times \:23\right)+\left(35\times \:41\right)+\left(64\times \:65\right)$

$=805+1435+4160$

$=6400$

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