Question

Найдите значение числового значения

Answer 1

1)
$\frac{2}{3} + 1 \frac{4}{5} = \frac{10}{15} + 1 \frac{12}{15} = \\ = 1 \frac{22}{15} = 2 \frac{7}{15}$
2)
$\frac{11}{15} - 2 \frac{3}{5} = \frac{11}{15} - \frac{13}{5} = \\ = \frac{11}{15} - \frac{39}{15} = - \frac{27}{15} = \\ = - 1 \frac{12}{15} = - 1 \frac{4}{5} = \\ = - 1.8$
3)
$4 \frac{5}{7} - 2 \frac{3}{14} = 4 \frac{10}{14} - 2 \frac{3}{14} = \\ = 2 \frac{7}{14} = 2 \frac{1}{2} = \\ = 2.5$