1) 32 + 11 + 18 + 39 = (32 + 39) + (11 + 18) = 71 + 29 = 100
2) 45 + 21 + 15 + 49 = (45 + 49) + (21 + 15) = 94 + 36 = 130
3) 64 + 33 + 16 + 47 = (64 + 47) + (33 + 16) = 111 + 49 = 160
1) 32 + 11 + 18 + 39 = (32 + 39) + (11 + 18) = 71 + 29 = 100
2) 45 + 21 + 15 + 49 = (45 + 49) + (21 + 15) = 94 + 36 = 130
3) 64 + 33 + 16 + 47 = (64 + 47) + (33 + 16) = 111 + 49 = 160