1. 11101001₂ + 1011001₂ = 322₁₀
11101001₂
+
1011001₂
__________
101000010₂
101000010₂ = 1*2⁸ + 0*2⁷ + 1*2⁶ + 0*2⁵ + 0*2⁴ + 0*2³ + 0*2² + 1*2¹ + 0*2⁰ = 256 + 64 + 2 = 322₁₀
Проверка:
11101001₂ = 1*2⁷ + 1*2⁶ + 1*2⁵ + 0*2⁴ + 1*2³ + 0*2² + 0*2¹ + 1*2⁰ = 128 + 64 + 32 + 8 + 1 = 233₁₀
1011001₂ = 1*2⁶ + 0*2⁵ + 1*2⁴ + 1*2³ + 0*2² + 0*2¹ + 1*2⁰ = 64 + 16 + 8 + 1 = 89₁₀
233 + 89 = 322
2. 24₁₀ = 30₈
24₁₀ = 30ₓ
24₁₀ = 3*x¹ + 0*x⁰
24₁₀ = 3x
x = 8