Răspuns:
-5ab
Explicație pas cu pas:
0, ( 5 ) = 5 / 9
1, ( 6 ) = 1 6 / 9 = ( 1 x 9 + 6 ) / 9 = ( 9 + 6 ) / 9 = 15 / 9 = 5 / 3
5 / 9a x 0,3b + 0,5a x 5 / 3b - 2,3 x 3ab + 0,9ab =
= 5 / 9a x 3 / 10b + 5 / 10a x 5 / 3b - 6,9ab + 0,9 ab
= 1 / 3a x 1 / 2b + 5 / 6ab - 6,9ab + 0,9ab
= 1 / 6ab + 5 / 6 ab - 6,9ab + 0,9ab
= 6 / 6ab - 69 / 10ab + 9 / 10ab
= ab - 69 / 10ab + 9 / 10ab
= ab / 1 - 69 / 10ab + 9 / 10ab
= 10ab / 10 - 69 / 10ab + 9 / 10ab
= ( 10ab - 69ab + 9ab ) / 10
= ( -59ab + 9ab ) / 10
= -50ab / 10
= -5ab
