Answer:
1. Gained 9 kilos =

2. 32 steps backward =

3. Decreased by P5 =

Explanation:
Natural numbers refer to numbers that are used for counting.
Whole numbers include 0 and natural numbers.
An integer is a collection of whole numbers and their negatives.
1. Gained 9 kilos =

(Gained is denoted by + )
2. 32 steps backward =

(backward is denoted by - )
3. Decreased by P5 =

(decrease is denoted by - )