Помогите : (0.2- 7/15) × (- 5/8 ) × (5/10 - 0.75) × 2 целых 1/3 =

Question

Помогите : (0.2- 7/15) × (- 5/8 ) × (5/10 - 0.75) × 2 целых 1/3 =

Answer 1

(0,2 - 7/15) * (- 5/8) * (5/10 - 0,75) * 2 1/3 = - 7/72
1) 0,2 - 7/15 = 2/10 - 7/15 = 6/30 - 14/30 = - 8/30 
2) 5/10 - 0,75 = 0,5 - 0,75 = - 0,25
3) (- 8/30) * (- 5/8) = 5/30 = 1/6
4) 1/6 * (- 0,25) = 1/6 * (- 25/100) = 50/300 * (- 75/300) = - (1*1)/(4*6) = - 1/24
5) (- 1/24) * 2 1/3 = - 1/24 * 7/3 = - 7/72