1. Bilangan Desimal

Bil. Desimal

• Base : 10
• Radix ( simbol ) : 0 – 9

Contoh :
(125)₁₀ = (1×10²) + (2×10) + (5×10⁰)
(125)₁₀ = 100 + 20 + 5
(125)₁₀ = 125

2. Bilangan Biner

Bil. Biner

• Base : 2
• Radix : 0 dan 1

Contoh :

(1011)₂ = (1×2³) + (0x2²) + (1×2¹) + (1×2⁰)
(1011)₂ = 8 + 0 + 2 + 1
(1011)₂ = (13)₁₀

3. Bilangan Oktal

Bil. Oktal

• Base : 8
• Radix : 0 – 7

Contoh :

(127)₈ = (1×8²) + (2×8¹) + (7×8⁰)
(127)₈ = 64 + 16 + 7
(127)₈ = (87)₁₀

4. Bilangan Hexadesimal

Bil. Hexadesimal

• Base : 16
• Radix : 0 – 9, A, B, C, D, E, F

Contoh :

(12D)₁₆ = (1×16²) + (2×16¹) + (Dx16⁰)
(12D)₁₆ = 256 + 32 + 13
(12D)₁₆ = (301)₁₀