Question

СРОЧНО!!!!! Помогите решить 20:(6 3/10 + 1 8/10) + (7 2/5 - 5,8)=?

Answer 1

1) 6 3/10 + 1 8/10 = 7 11/10 = 8 1/10
2) 7 2/5 - 5,8 = 7 2/5 - 5 4/5 = 6 7/5 - 5 4/5 = 1 3/5
3) 20 : 8 1/10 = 20 : 81/10 = 200/81 = 2 38/81
4) 2 38/81 + 1 3/5 = 2 190/405 + 1 243/405 = 3 433/405 = 4 28/405
Ответ 4 28/405