Question

пример 1/15+2/45+7/15

Answer 1

$frac{1}{15} + frac{2}{45} + frac{7}{15} = frac{8}{15} + frac{2}{45} = \ \ = frac{8*3}{15*3} + frac{2}{45} = frac{24+2}{45} = frac{26}{45}$