Question

Answer 1

1: =(23+17)/9=40/9

3: =22/72+21/72=43/72

4: \(=\dfrac{12}{56}+\dfrac{35}{56}-\dfrac{28}{56}=\dfrac{19}{56}\)

5: \(=\dfrac{1}{6}+\dfrac{1}{6}-\dfrac{1}{4}=\dfrac{1}{3}-\dfrac{1}{4}=\dfrac{1}{12}\)

6: \(=\dfrac{-10}{20}\cdot\dfrac{36}{9}=\dfrac{-1}{2}\cdot4=-2\)

7: \(=\dfrac{16}{5}\cdot\dfrac{-25}{32}=-\dfrac{5}{2}\)

8: \(=\dfrac{-5}{8}\cdot\dfrac{4}{15}=\dfrac{-1}{3}\cdot\dfrac{1}{2}=\dfrac{-1}{6}\)