Ответ:1001₂ = 1 × 23 + 0 × 22 + 0 × 21 + 1 × 20 = 8 + 1 = 9.13₈ = 1 × 81 + 3 × 80 = 8 + 3 = 11.A₁₆ = 10 × 160 = 10.8₁₀ = 8.Ответ: 1001₂ = 9; 13₈ = 11; A₁₆ = 10; 8₁₀ = 8.