Matematyka z plusem , Zbiór Zadań I gimnazjum.  Zdj. w załączniku (ćw 65 str 18)

a) (2,2 * 7,7) : 0,014 = 16,94 : 0,014 = 1210   b) (53/12 - (4/1 : 8/3)) * 1,8 = (53/12 - (4/1 * 3/8) * 1,8 = (53/12 - 3/2) * 1,8 = (53/12 - 18/12) * 1,8 = 35/12 * 1 i 4/5 = 35/12 * 9/5 = 21/4 = 5 i 1/4   c) (17/8 - 5/3) : (11/8 : 4/3) = (51/24 - 40/24) : (11/8 * 3/4) = 11/24 : 33/32 = 11/24 * 32/33 = 4/9   d) (25/16 * 3 i 1/5) + 48 : (3/5 * 8/7) = (25/16 * 16/5) + 48 : (24/35) = 5 + (48/1 * 35/24) = 5 + 70 = 75   e) ((7/4 * 64/21) + 1/6) : 36/100 + 2/3 = (16/3 + 1/6) : 9/25 + 2/3 = (32/6 + 1/6) : 27/75 + 50/75 = 33/6 : 75/75 = 33/6 : 1 = 33/6 = 5 i 3/6 = 5 i 1/2   f) [((12/5 * (5/6)²) - 1/6] : 1/3 + 3/2 = (5/3 - 1/6) : 2/6 + 9/6 = (10/6 - 1/6) : 11/6 = 9/6 * 6/11 = 9/11   g) [(7/5 + 5/3) : 25/3] : 11/9 - 19/18 = [(21/15 + 25/15) : 25/3] : 22/18 - 19/18 = (46/15 * 3/25) : 3/18 = 46/125 * 18/3 = 276/125 = 2 i 16/125   h) [(9/4 - 11/6) * 12/5] : [10/9 * (103/20 - 9/4)] = [(27/12 - 22/12) * 12/5] : [10/9 * (103/20 - 45/20) = (5/12 * 12/5) : (10/9 * 58/20) = 1 : 29/9 = 1/1 * 9/29 = 9/29   i) (6/5 : 3/8) : (166/25 - (21/40 : 35/16)) = (6/5 * 8/3) : (166/25 - (21/40 * 16/35)) = 16/5 : (166/25 - 6/25) = 16/5 : 160/25 = 16/5 * 25/160 = 5/10 = 1/2