Question

3.Вычислите
a) (7/8+9/11+15/17)+(1/8+2/11+2/17)=

b) (1 5/9+2 7/13+3 11/19)+(3 4/9+2 6/13+1 8/19)=

ПОЖАЛУЙСТА ПОМОГИТЕ
.

Answer 1

а) = 7/8 + 9/11 + 15/17 + 1/8 + 2/11 + 2/17 = (7/8 + 1/8) + (9/11 + 2/11) + (15/17 + 2/17) = 8/8 + 11/11 + 17/17 = 1+1+1 = 3
b) = 1 5/9 + 2 7/13 + 3 11/19 + 3 4/9 + 2 6/13 + 1 8/19 = (1 5/9 + 3 4/9) + (2 7/13 + 2 6/13) + (3 11/19 + 1 8/19) = 4 9/9 + 4 13/13 + 4 19/19 = 5+5+5=15