Question

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Answer 1

1. $\frac{4}{23} +\frac{9}{23} - \frac{11}{23} = \frac{4+9-11}{23} = \frac{2}{23}$

2. $\frac{7}{31} - \frac{5}{31} +\frac{24}{31} = \frac{7-5+24}{31} = \frac{26}{31}$

3. $(\frac{4}{15} +\frac{11}{15} ) - \frac{7}{15} = 1-\frac{7}{15} = \frac{15}{15} - \frac{7}{15} = \frac{8}{15}$

4. $\frac{17}{18} - (\frac{5}{18} +\frac{11}{18} ) = \frac{17}{18} - \frac{16}{18} = \frac{1}{18}$