Addition - creating larger numbers

Cartoon numbers are used to illustrate how you can change one number into a larger number by adding hundreds, tens and units in a simple process. In the first example, 158 is turned into 258 by adding 100. In the second example, 438 is turned into 679 by first adding a single unit to make 439, then adding 40 to make 479, and finally adding 200 to get 679.