Speedo

This task is about making adjustments to a trip meter.
Questions/instructions
A trip meter on a speedo shows how many kilometres a car travels.
 
1. Write what the trip meter will show if the car travels one more kilometre than
2.    Write what the trip meter will show if the car travels ten more kilometres than:
3.    Write what the trip meter will show if the car travels one hundred more kilometres than:
4.    Write what the trip meter will show if the car travels one thousand more kilometres than:
5.    Write what the trip meter showed one kilometre before this:
6.    Write what the trip meter showed ten kilometres before this:
7.    Write what the trip meter showed one hundred kilometres before this:
8.    Write what the trip meter showed one thousand kilometres before this: