Ответ:

a) 11000100102 = 1 × 29 + 1 × 28 + 0 × 27 + 0 × 26 + 0 × 25 + 1 × 24 + 0 × 23 + 0 × 22 + 1 × 21 + 0 × 20 = 512 + 256 + 16 + 2 = 786

б) 100110112 = 1 × 27 + 0 × 26 + 0 × 25 + 1 × 24 + 1 × 23 + 0 × 22 + 1 × 21 + 1 × 20 = 128 + 16 + 8 + 2 + 1 = 155

Ответ: a) 786; б) 155.