Question

решите, пожайлуста
д) - 3/8 + 5/6 =
е) - 3 5/9 - 2 7/18 =

Answer 1

$displaystyle tt -frac{3}{8}+frac{5}{6}=frac{20}{24}-frac{9}{24}=frac{11}{24};\\\-3frac{5}{9}-2frac{7}{18}=-3frac{10}{18}-2frac{7}{18}=-5frac{17}{18};$

Answer 2

-3/8 + 5/6 = - 9 + 20/24 = 11/24

- 3 5/9 - 2 7/18 = - (3 5/9 + 2 7/18) = - ((3 + 2) + (5/9 + 7/18)) = - (5 + 17/18) = - 5 17/18