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

Toán Lớp 7: (-1/3)^2 . (0.7-2/5)+(-2021)^0

Toán Lớp 7: (-1/3)^2 . (0.7-2/5)+(-2021)^0

Comments ( 1 )

  1. $(\frac{-1}{3})^{2}$ .(0,7-$\frac{2}{5}$)+ $(-2021)^{0}$
    =$\frac{1}{9}$.($\frac{7}{10}$-$\frac{2}{5}$) – 1
    =$\frac{7}{90}$-$\frac{2}{45}$-1
    =$\frac{7}{90}$-$\frac{4}{90}$-$\frac{90}{90}$
    =$\frac{7-4-90}{90}$
    =$\frac{-87}{90}$
     

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

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