Check out this website that has loads of activities using a hundreds chart. You may find one of the hundreds charts below helpful.
Interactive 100's Boards - Great to use with a smartboard
This hundreds board activity asks you to find a number that is a certain number more or less than a given number.
Fill in the missing numbers to complete the hundreds chart.
The splat hundreds chart lets you use different colours to highlight numbers. This would be great for showing patterns on the hundreds chart.
This number chart can be from 1 - 100 or you can make it 0-99.
This interactive hundreds chart can be used to explore number patterns. You can even print off your hundreds chart when you are finished.
Practice adding and subtracting using a hundreds chart with this link.