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

Toán Lớp 7: [-2/3+] :4/5+[-1/3+4/7]:4/5 xin giúp mình với

Toán Lớp 7: [-2/3+] :4/5+[-1/3+4/7]:4/5
xin giúp mình với

Comments ( 2 )

  1. $\text{($\dfrac{-2}{3}$):$\dfrac{4}{5}$+($\dfrac{-1}{3}$+$\dfrac{4}{7}$:$\dfrac{4}{5}$}$
    $\text{=($\dfrac{-2}{3}$+($\dfrac{-1}{3}$+$\dfrac{4}{7}$):$\dfrac{4}{5}$}$
    $\text{=$\dfrac{-3}{7}$:$\dfrac{4}{5}$}$
    $\text{=-$\dfrac{15}{28}$}$

  2. Giải đáp + Lời giải và giải thích chi tiết:
    (-2/3) : 4/5 + (-1/3 + 4/7) : 4/5
    = [-2/3 + (-1/3) + 4/7] : 4/5
    = [-1 + 4/7] : 4/5
    = -3/7 : 4/5
    = -15/28

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