Oblicz w pamięci: a) 2/3+1i2/3, 2i5/7-1i6/7, 3/9x10, 1i2/3:1/3, (2/5)do potęgi drugiej(2), (1/3)3, (1i1/4)2, (1i1/2)3

a) 2/3 + 1 2/3 = 2 1/3 2 5/7 - 1 6/7 = 6/7 3/9x10 = 3 3/9 = 3 1/3 1 2/3 : 1/3 = 5/3 : 1/3 = 3/5 x 1/3 = 3/15 = 1/5 2/5 do 2 = 4/25 1/3 do 3 = 1/27 1 1/4 do 2 = 5/4 do 2 = 25/16 = 1 9/16 1 1/2 do 3 = 3/2 do 3 = 27/8 = 3 3/8