Question

4) 7) 8) допоможіть пж. Даю 25 балів.​

Answer 1

$4) \: - \frac{5}{9} + \frac{1}{3} + 2 = - \frac{5}{9} + \frac{3}{9} + 2 = - \frac{2}{9} + 1 \frac{9}{9} = 1 \frac{7}{9} \\ 7) \: 15 \frac{13}{15} + ( - 21.34) + 14 \frac{2}{15} + ( - 6 \frac{33}{50} ) = \\ = (15 \frac{13}{15} + 14 \frac{2}{15} ) - (21.34 + 6.66) = 30 - 28 = 2 \\ 8) \: 10 \frac{15}{19} + ( - 43 \frac{8}{13} ) + 12 \frac{4}{19} + ( - 56 \frac{5}{13} ) = \\ = (10 \frac{15}{19} + 12 \frac{4}{19} ) - (43 \frac{8}{13} + 56 \frac{5}{13} ) = 23 - 100 = - 77$