*b is the radix of the numeral x Two arithmetic complements Radix complement of x is written x X=(6b)-X diminish radix complement of x is written x-1 X.1=(b-1)-X 10s complement (radix complement) of 610 10-6=4 9s complement(Diminish radix complement )of 6 10-1-6=310*b is the radix of the numeral x • Two arithmetic complements – Radix complement of x is written x’ – X’ = (b) – X – diminish radix complement of x is written x-1’ – X-1 ’ = (b - 1) – X • 10s complement (radix complement) of 610 • 10-6=410 • 9s complement ( Diminish radix complement ) of 610 •10-1-6=310