1, a first set of numbers (IP address calculation for each bit 1 respectively)
128 64 32 16 8 4 2 1
10000000=128 00001000=8
01000000=64 00000100=4
00100000=32 00000010=2
00010000=16 00000001=1
2, a second set of numbers (for calculating the subnet mask, 1 each from left to right, respectively)
128 192 224 250 248 252 254 255
10000000=128 11111000=248
11000000=192 11111100=252
11100000=224 11111110=254
11110000=240 11111111=255
3, a third set number (for calculating the broadcast address, respectively from right to left every 1)
1 3 7 15 31 63 127 255
00000001=1 00011111=31
00000011=3 00111111=63
00000111=7 01111111=127
00001111=15 11111111=255