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

Toán Lớp 6: Bài 1: d,( 125.7 ² – 5. 35 ²): 2021^2022

Toán Lớp 6: Bài 1:
d,( 125.7 ² – 5. 35 ²): 2021^2022

Comments ( 2 )

  1. (125 . 7^2 – 5 . 35^2)  : 2021^2022
    = (5^3 . 7^2 – 5 . 5^2 . 7^2) : 2021^2022
    = (5^3 . 7^2 – 5^3 . 7^2) : 2021^2022
    = 0 : 2021^2022
    = 0

  2. (125.7^2-5.35^2):2021^2022
    =[5^3 .7^2-5.(5.7)^2]:2021^2022
    =[5^3 .7^2-5.5^2 .7^2]:2021^2022
    =[5^3 .(7^2-7^2)]:2021^2022
    =[5^3 .0]:2021^2022
    =0:2021^2022
    =0

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

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