а) 13/18 • 6/7 = 78/126 = 13/21
б) (2/5)³ = (2^3)/(5^3) = 8/125
в) (6/11 + 3/22) • 1/15 = (12/22 + 3/22) • 1/15 = 15/22 • 1/15 = 1/22
а) 13/18 • 6/7 = 78/126 = 13/21
б) (2/5)³ = (2^3)/(5^3) = 8/125
в) (6/11 + 3/22) • 1/15 = (12/22 + 3/22) • 1/15 = 15/22 • 1/15 = 1/22