8. 45:15, 78:6.3, 100-4.18, (34+36):10, 99:33, 51:3.4, 100-6.13, (75-33):3, 80:16, 84:4.3, 100-4.25, (82-16):33

* 45 : 15 = 3 * 78 : 6 * 3 = 13 * 3 = 39 * 100 - 4 * 18 = 100 - 72 = 28 * (34 + 36) : 10 = 70 : 10 = 7 * 99 : 33 = 3 * 51 : 3 * 4 = 17 * 4 = 68 * 100 - 6 * 13 = 100 - 78 = 22 * (75 - 33) : 3 = 42 : 3 = 14 * 80 : 16 = 5 * 84 : 4 * 3 = 21 * 3 = 63 * 100 - 4 * 25 = 100 - 100 = 0 * (82 - 16) : 33 = 66 : 33 = 2