FUN WITH ROMAN NUMERALS

This team once again hits a home run with their latest math title (Working with Fractions, 2007, etc.). Repetition and lots of examples are the keys Adler uses to make Roman numerals both understandable and memorable. Beginning with the seven symbols, the text introduces the concept that their values never change, unlike the Arabic system in common use. Readers then learn when and how to add and subtract to make numbers—Adler relates this to paying for something and getting change back (in fact, one activity encourages readers to use coins to practice writing Roman numerals). Building on this, readers learn how the symbols interact and about the top bar and open box that are used to make even larger numbers. Miller’s Roman-themed digital illustrations add humor and interest. The final spread is a collage of photographs showing Roman numerals in real-life settings, encouraging readers to be on the lookout for more. Comprehensive, readable and understandable, with a concrete activity, this is the resource for teachers. (Informational picture book. 7-12)