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

Toán Lớp 7: Bài 1:tính e) $\frac{4}{5}$ . $(\frac{7}{2}$ + $\frac{1}{4})^{2}$

Toán Lớp 7: Bài 1:tính
e) $\frac{4}{5}$ . $(\frac{7}{2}$ + $\frac{1}{4})^{2}$

Comments ( 2 )

  1. e) $\dfrac{4}{5}$. ( \frac{7}{2} + \frac{1}{4} )^2
    = $\dfrac{4}{5}$. ( \frac{14}{4} + \frac{1}{4} )^2
    = $\dfrac{4}{5}$. ( \frac{15}{4} )^2
    = $\dfrac{4}{5}$. $\dfrac{15}{4}$
    = $\dfrac{4}{5}$. $\dfrac{225}{16}$
    = $\dfrac{4. 225}{5. 16}$
    = $\dfrac{45}{4}$
     

  2. $\frac{4}{5}$ . ( $\frac{7}{2}$ + $\frac{1}{4}$ ) $^{2}$ 
    = $\frac{4}{5}$ . ($\frac{15}{4}$) $^{2}$
    = $\frac{4}{5}$ . $\frac{225}{16}$
    = $\frac{45}{4}$
                                      #Study well <3 
     

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