Suppose David and Mohan have started walking from zero position in opposite directions, Let the steps to right of zero be represented by '+' sign and to the left of zero be represented by ‘-’ sign. If Mohan moves 5 steps to the right of zero it can be represented as +5 and if David moves 5 steps to the left of zero it can be represented as -5. Now, represent the positions with ‘+’ or ‘-’ sign:
11 steps to the right of zero.
As moving right is represented with ‘+’ sign.
So, 11 steps to the right of zero = .