Question

Tính M = 3/5+3/7- 3/11/ 4/5+4/7- 4/11

Answer 1

\(M=\left(\frac{3}{5}+\frac{4}{5}\right)+\left(\frac{3}{7}+\frac{4}{7}\right)-\left(\frac{3}{11}+\frac{4}{11}\right)\)

\(=\frac{7}{5}+1-\frac{7}{11}\)

\(\frac{12}{5}-\frac{7}{11}\)

\(=......t\text{ự}t\text{ính}nh\text{á}\)

Answer 2

\(=\frac{3}{5}+\frac{3}{7}-\frac{3}{11}+\frac{4}{5}+\frac{4}{7}-\frac{4}{11}\)

\(=\left(\frac{3}{5}+\frac{4}{5}\right)+\left(\frac{3}{7}+\frac{4}{7}\right)-\left(\frac{3}{11}+\frac{4}{11}\right)\)

\(=\frac{7}{5}+1-\frac{7}{11}\)

\(=\frac{12}{5}-\frac{7}{11}\)

\(=\frac{97}{55}\)

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