1. (3 44/55 - 1 22/55) : 2 33/55=2 23/55 : 2 33/55=133/55:143/55= =133/55 x 55/143=133/143 2. (71/2+15/18) x (32/9+2 5/12)=(35 1/2+5/6) x (3 5/9+2 5/12)= =(35 3/6+5/6) x (3 60/108+2 45/108)=35 8/6 x 5 105/108=36 1/3 x 645/108= =108/3 x 645/108=215 3. (2 1/3 x 25/42 - 1) : (1-1 3/5 x 3/16)=(7/3 x 25/42 -1) : (1- 8/5 x 3/16)= =(25/18-1) : (1- 3/10)=(1 7/18-1) : 7/10=7/18 x 10/7=5/9 4. (2 3/5+1 2/15) : (5 2/5 - 2 1/3)=(2 9/15+1 2/15) : (5 6/15-2 5 15)= =3 11/15 : 3 1/15=56/15 : 46/15=56/15 x 15/46=56/46=1 10/46=1 5/23 x to mnożenie
(3 i 9/11 - 1 i 2/5) : 2 i 33/55 = (3 i 45/55 - 1 i 22/55) : 2 i 33/55 = 2 i 23/55 : 2 i 33/55 = 133/55 * 55/143 = 133/143 (7 i 1/2 + 1 i 5/18) * (3 i 2/9 + 2 i 5/12) = 97 i 9/18 + 1 i 5/18) * (3 i 6/36 + 2 i 15/36) = 8 i 14/18 * 5 i 21/36 = 158/18 * 201/36 = 5293/108 = 49 i 1/108 2 i 1/3 * 25/42) - 1 : (1 - 1 i 3/5 * 3/16) =( 7/3 * 25/42) - 1 : (1 - 8/5 * 3/16) = 25/18 - 1 : (1 - 3/10) = 25/18 - 1 : (10/10 - 3/10 ) = 25/18 - 1 : 13/10 = 25/18 - 1 * 10/13 = 25/18 - 10/13 = 325/234 - 180/234 = 145/234 (2 i 3/5 + 1 i 2/15) : (5 i 2/5 - 2 i 1/3) = (2 i 9/15 + 1 i 2/15) : (5 i 6/15 - 2 i 5/15) = 3 i 11/15 : 3 i 1/15 = 56/15 * 15/46 = 56/46 = 1 i 10/46 = 1 i 5/23
