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