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

Toán Lớp 7: ($\frac{-5}{2}$)$^{2}$ : (-15) – (-0,45 + $\frac{3}{4}$) . (-1$\frac{5}{9}$)

Toán Lớp 7: ($\frac{-5}{2}$)$^{2}$ : (-15) – (-0,45 + $\frac{3}{4}$) . (-1$\frac{5}{9}$)

Comments ( 2 )

  1. Giải đáp: $\frac{1}{20}$
    Giải thích:
    $(\frac{-5}{2})^2:(-15)-(-0,45+\frac{3}{4}).(-1\frac{5}{9})$
    $=\frac{25}{4}.\frac{-1}{15}-\frac{3}{10}.\frac{-14}{9}$
    $=\frac{-5}{12}+\frac{7}{15}$
    $=\frac{1}{20}$

  2. $\text{ $( \dfrac{-5}{2} )^2$ : ( -15 ) – ( -0,45 + $\dfrac{3}{4}$ ). ( -1$\dfrac{5}{9}$ ) }$
    $\text{ = $\dfrac{25}{4}$. $\dfrac{-1}{15}$ – $\dfrac{3}{10}$. ( $\dfrac{-14}{9}$ ) }$
    $\text{ = $\dfrac{-5}{12}$ – $\dfrac{-7}{15}$ }$
    $\text{ = $\dfrac{1}{20}$ }$
     

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

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