1) 56 : 8 = 7
2) 54 : 9 = 6
3) 81 : 9 * 8 = 9 * 8 = 72
4) 45 : 5 * 7 = 9 * 7 = 63
5) 4 * 9 - 40 : 5 = 36 - 8 = 28
6) 42 : 6 + 8 * 8 = 7 + 64 = 71
7) 27 : (20 - 11) = 27 : 9 = 3
8) 49 : (60 - 53) = 49 : 7 = 7