Addition in Base 2, 5 and 8

Rule

Add like normal, but when the sum reaches the base, carry 1.

Base 2

1+1 = 10₂ (write 0 carry 1).
Example: 1011₂ + 110₂ = 10001₂.

Base 5

Digits 0-4 only. 3+4 = 7 = 12₅ (write 2 carry 1).
Example: 234₅ + 43₅ = 332₅.

Base 8

Digits 0-7 only. 6+5 = 11 = 13₈ (write 3 carry 1).
Example: 57₈ + 26₈ = 105₈.

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