Question

помогите пожалуйста!

Answer 1

1)

$\frac{5 + 7}{18} + \frac{4 + 5}{81} = \frac{6}{9} + \frac{1}{9} = \frac{7}{9}$

2)

$\frac{9 + 11}{40} + \frac{13 + 12}{50} = \frac{20}{40} + \frac{25}{50} = \frac{1}{2} + \frac{1}{2} = 1$

3)

$\frac{7 + 9}{16} + \frac{11 + 17}{42} = \frac{16}{16} + \frac{28}{42} = 1 + \frac{2}{3} = 1 \frac{2}{3}$

4)

$6 \frac{17 + 4}{24} + 5 \frac{1 + 8}{36} = 6 \frac{7}{8} + 5 \frac{2}{8} = 11 \frac{9}{8} = 12 \frac{1}{8}$