Question

пж быстрее рил помогите​

Answer 1

( 9 - 1 5/9× 2 1/7) : 2 4/15

= (9 - 14/9 × 15/7) : 34/15

= (9 - 2/3 × 5) × 15/34

= (9- 10/3)× 15/34

= 17/3 × 15/34

= 5/2 = 2 1/2 .

Answer 2

$(9-1\frac{5}{9}*2\frac{1}{7}):2\frac{4}{15}=(9-\frac{14}{9}*\frac{15}{7}):\frac{34}{15}=(9-\frac{2}{3}*5)*\frac{15}{34}=(9-\frac{10}{3})*\frac{15}{34}=\\ \\ \frac{17}{3}*\frac{15}{34}=\frac{5}{2}=2\frac{1}{2}=2,5$