Question

thực hiện phép tính:

1)\(\frac{12}{7}:\frac{16}{5}\)

2)\(\frac{-2}{7}:\frac{6}{11}\)

3)\(\frac{-1}{7}:\frac{-1}{5}\)

4)\(\left(-2\right):\frac{6}{11}\)

5\(\frac{-6}{11}:\left(-3\right)\))

Answer 1

1: Ta có: \(\frac{12}{7}:\frac{16}{5}\)

\(=\frac{12}{7}\cdot\frac{5}{16}=\frac{60}{112}=\frac{15}{28}\)

2: Ta có: \(\frac{-2}{7}:\frac{6}{11}\)

\(=\frac{-2}{7}\cdot\frac{11}{6}=\frac{-22}{42}=\frac{-11}{21}\)

3: Ta có: \(\frac{-1}{7}:\frac{-1}{5}\)

\(=\frac{-1}{7}\cdot\frac{5}{-1}=\frac{5}{7}\)

4: Ta có: \(\left(-2\right):\frac{6}{11}\)

\(=\frac{-2\cdot11}{6}=\frac{-22}{6}=\frac{-11}{3}\)

5: Ta có: \(\frac{-6}{11}:\left(-3\right)\)

\(=\frac{-6}{11}\cdot\frac{1}{-3}=\frac{-6}{-33}=\frac{2}{11}\)