nie pomogę bo nie miałam tego w szkole jeszcze
a).(0,5)³+(1/3)² = (1/2)³+(1/3)² = 1/8+1/9 = 9/72+8/72 = 17/72 b).(0,1)³+(0,2)³ = 0,001+0,008 = 0,009 c).3 · (1 i 2/3)² - 2 · (0,5)³ = 3 · (5/3)² - 2 · (5/10)³ = 3 · 25/9 - 2 · (1/2)³ = =25/3 - 2 · 1/8 = 8 i 1/3 - 1/4 = 8 i 4/12 - 3/12 = 8 i 1/12 d).(5 i 1/4 - 5,05)² - 1/25 = (5 i 1/4 - 5 i 5/100)² - 1/25 = (5 i 1/4 - 5 i 1/20)² - 1/25 = (5 i 5/20 - 5 i 1/20)² - 1/25 = (4/20)² - 1/25 = (1/5)² - 1/25 = 1/25 - 1/25 = 0 e).2,5 · 4 i 1/2 - 5 i 17/20 : 0,9 = 2 i 1/2 · 4 i 1/2 - 117/20 : 9/10 = =5/2 · 9/2 - 117/20 · 10/9 = 45/4 - 13/2 = 45/4 - 26/4 = 19/4 = 4 i 3/4 f).(5/6+1/3) : (2 i 2/3 - 1,75) = (5/6+2/6) : (2 i 2/3 - 1 i 3/4) = =7/6 : (2 i 8/12 - 1 i 9/12) = 7/6 : (1 i 20/12 - 1 i 9/12) = 7/6 : 11/12 = =7/6 · 12/11 = 14/11 = 1 i 3/11