Question

20 целых 7/8-(15 целых 5/6-9 целых 4/9)=

Answer 1

Решение:

$20\dfrac{7}{8} -\Big (15\dfrac{5}{6} -9\dfrac{4}{9} \Big)=14\dfrac{35}{72}$

$1)~~ 15\dfrac{5}{6} -9\dfrac{4}{9} = 15\dfrac{15}{18} -9\dfrac{8}{18} = 6\dfrac{7}{18}.$

$2)~~20\dfrac{7}{8} - 6 \dfrac{7}{18} = 20\dfrac{63}{72} - 6 \dfrac{28}{72} = 14\dfrac{35}{72} .$