a) 8.5^2 - 189:3^2 b) 2020-[45-(6-1)^2]+2019^0 c) 200:[117-(23-6)] Mn giải hộ mk vs ạ, cảm ơn mn nhìu ạ:>

`a) 8 · 5^2 - 189 ÷ 3^2`

`= 8 . 25 - 189 ÷ 9`

`= 200 - 21`

`= 179`

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`b) 2020 - [ 45 - ( 6 - 1)^2] + 2019^0`

`= 2020 - [ 45 - 5^2 ] + 1`

`= 2020 - [ 45 - 25 ] + 1`

`= 2020 - 20 + 1`

`= 2000 + 1`

`= 2001`

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`c) 200 ÷ [ 117 - (23 - 6)]`

`= 200 ÷ [ 117 - 17 ]`

`= 200 ÷ 100`

`= 2`

    `@Zun` 👣