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

Toán Lớp 7: B = 10 × √81/100 – 2 ×|-5| + (-1)^2020 + 2021 Nhanh cần gấp ạ

Toán Lớp 7: B = 10 × √81/100 – 2 ×|-5| + (-1)^2020 + 2021
Nhanh cần gấp ạ

Comments ( 2 )

  1. B = 10 xx \sqrt(81/100) – 2 xx |-5| + (-1)^{2020} + 2021
    B = 10 xx 9/10 – 2 xx 5 + 1 + 2021
    B = 9 – 2 xx 5 + 1 + 2021
    B = 9 – 10 + 1 + 2021
    B = (-1) + 1 + 2021
    B = 0 + 2021
    B = 2021

  2. B=10xx\sqrt{81/100}-2xx|-5|+(-1)^2020+2021
    ->B=10xx\sqrt{(9/10)^2}-2xx5+1+2021
    ->B=10xx|9/10|-2xx5+1+2021
    ->B=10xx9/10-2xx5+1+2021
    ->B=((10xx9)/10)-(2xx5)+1+2021
    ->B=90/10-10+1+2021
    ->B=9-10+1+2021
    ->B=(-1)+1+2021
    ->B=[(-1)+1]+2021
    ->B=0+2021
    ->B=2021
     

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