A set of 64 colourful strips focussing on 100 more and 100 less. Print and trim the strips before placing on a whiteboard/piece of paper. Ask the children to write the number 100 less on the left and the number 100 more on the right. This set mainly focusses on 3-digit numbers but does have some 4-digit numbers included also.
 
16 pages in total - 4 strips per page.