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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: 3 mũ 2021 + 24 x 3 mũ 2020 – 3 mũ 2019 làm hộ mk với các cao nhân

Toán Lớp 6: 3 mũ 2021 + 24 x 3 mũ 2020 – 3 mũ 2019
làm hộ mk với các cao nhân

Comments ( 2 )

  1. (3^2021 +24 . 3^2020 ):3^2019
    =(3^2021 +8.3.3^2020 ):3^2019
    =(3^2021 + 8.3^2021 ):3^2019
    =(1+8).3^2021 :3^2019
    =9 . 3^(2021-2019)
    =9.3²=9.9=81

  2. ( 3^{2021} + 24 × 3^{2020} ) : 3^{2019}
    =  3^{2020} × ( 3 + 24 )  : 3^{2019}
    = ( 3^{2020} × 27 ) : 3^{2019}
    = ( 3^{2020} × 3^3 ) : 3^{2019}
    = 3^{2023} : 3^{2019}
    = 3^4
    = 81
     

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222-9+11+12:2*14+14 = ? ( )