A class of children order a set of cards numbered from 1 to 500 using hundreds, tens and units. Mr Numbervator asks the children to sort the cards into groups of 1-100, 101-200, 201-300 and 401-500.

Image caption, Each digit has moved three places to the left. This creates a gap in the hundreds, tens and the units place. When dividing by 100, each digit moves two places to the right.