Question

tính nhanh phân số

5        + 5   + 5

17        49      131

7      + 7     + 7 

17       49      131

ai nhanh nhâts mình tích

Answer 1

\(\frac{\frac{5}{17}+\frac{5}{49}+\frac{5}{131}}{\frac{7}{17}+\frac{7}{49}+\frac{7}{131}}\)

\(=\frac{5.\left(\frac{1}{17}+\frac{1}{49}+\frac{1}{131}\right)}{7.\left(\frac{1}{17}+\frac{1}{49}+\frac{1}{131}\right)}\)

\(=\frac{5}{7}\)

Answer 2

=\(\frac{5.\left(\frac{1}{17}+\frac{1}{49}+\frac{1}{131}\right)}{7.\left(\frac{1}{17}+\frac{1}{49}+\frac{1}{131}\right)}\)

=\(\frac{5}{7}\)

Answer 3

K MINH DI

Answer 4

\(\frac{\frac{5}{17}+\frac{5}{49}+\frac{5}{131}}{\frac{7}{17}+\frac{7}{49}+\frac{7}{131}}=\frac{5\left(\frac{1}{17}+\frac{1}{49}+\frac{1}{131}\right)}{7\left(\frac{1}{17}+\frac{1}{49}+\frac{1}{131}\right)}\)\(=\frac{5}{7}\)

Answer 5

các bạn có thể giải thích rõ hơn vè vì sao = 5/7 đc ko

Answer 6

vẫn ko hỉu