Ajutor va rog ex 4 repede dau coroana!!

Răspuns:
/ = fractie
9 / 10 = 2 / 10 + 7 / 10
9 / 10 = 3 / 10 + 6 / 10
9 / 10 = 4 / 10 + 5 / 10
25 / 100 = 5 / 100 + 20 / 100
25 / 100 = 10 / 100 + 15 / 100
25 / 100 = 17 / 100 + 8 / 100