Your question refers to LDA and TODA.
The CAO defines them and they are fixed distances. They don't change and you don't factor them in any way.
LDR and TODR do you mean? Performance data for your aircraft should have factors or an ability to allow for slope.
Regarding slope, the CAO has this (my bold):
5 LANDING WEIGHT LIMITATIONS
5.1 For the purposes of paragraph 235 (2) (b) of the Regulations, the maximum
weight which an aeroplane to which this section applies may not exceed at
landing is the least of the weights determined in accordance with
subparagraphs (a) to (c):
(a) a weight at which the landing distance required in accordance with
subsection 11 for the aerodrome elevation, wind component along the
runway, runway slope (when exceeding 1%) and runway surface
conditions at the time of landing, is equal to or less than the landing
distance available in the direction of landing;
(b) a weight which will permit compliance with the approach climb
requirements specified in subsection 9, taking into account forecast or
ambient temperature and aerodrome elevation or approved declared
conditions;
(c) a weight which will permit compliance with the landing climb
requirements specified in subsection 10 taking into account forecast or
ambient temperature and aerodrome elevation or approved declared
conditions.