Question

Помогите плиз срочно быстрей​

Answer 1

a)

$1)1 frac{2}{5} + frac{2}{15} = 1 frac{6}{15} + frac{2}{15} = 1 frac{8}{15}$

$2)1 frac{1}{2} times 1 frac{8}{15} = frac{3}{2} times frac{23}{15} = \ = frac{23}{10} = 2 frac{3}{10} = 2.3$

$3)1.5 - 2.3 = - 0.8$

Ответ:-0.8

б)

$- frac{51}{14} div frac{17}{7} = - frac{51}{14} times frac{7}{17} = - frac{3}{2} \ = - 1 frac{1}{2} = - 1.5$

В)

$1)2 frac{2}{3} + 1 frac{5}{6} = 2 frac{4}{6} + 1 frac{5}{6} = 3 frac{9}{6} \ = 4 frac{3}{6} = 4 frac{1}{2}$

$2)4 frac{1}{2} div ( - 1 frac{1}{2} ) = - frac{9}{2} times frac{2}{3} = - 3$

Ответ:-3