Плизз помогите математика:)
502. 1) з/4 - 1/4 = 2/4 5) 3/10+1/10=4/10=2/5 2) 5/8 + 3/8 = 8/8 = 1 6) 17/25- 12/25 = 5/25 = 1/5 3) 7/12 - 5/12 = 2/12 = 1/6 7) 1/30 + 7/30 = 8 /30 = 4/ 15 4) 8/15 + 2/15 = 10/15 = 2/3 8) 28/45 - 13/45 = 15/45= 3/9=1/3