Toán Lớp 5: tính bằng 2 cách 7/11 : 3/5 + 4/11 : 3/5

TRẢ LỜI

1. text{Cách 1}

   7/11 : 3/5 + 4/11 : 3/5

   = ( 7/11 + 4/11 ) : 3/5

   = 11/11 : 3/5

   = 1 × 5/3

   = 5/3

   text{Cách 2}

   7/11 : 3/5 + 4/11 : 3/5

   = 7/11 × 5/3 + 4/11 × 5/3

   = 35/33 + 20/33

   = 55/33 = 5/3

   #dtkc

    

   Trả lời
2. $\text{Cách 1:$\frac{7}{11}$ : $\frac{3}{5}$ + $\frac{4}{11}$ : $\frac{3}{5}$ }$

   $\text{= $\frac{35}{33}$ + $\frac{20}{33}$ }$

   $\text{= $\frac{5}{3}$ }$

   $\text{Cách 2:$\frac{7}{11}$ : $\frac{3}{5}$ + $\frac{4}{11}$ : $\frac{3}{5}$ }$

   $\text{= ($\frac{7}{11}$ + $\frac{4}{11}$) : $\frac{3}{5}$ }$

   $\text{= 1 : $\frac{3}{5}$}$

   $\text{= $\frac{5}{3}$}$

   Trả lời