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Childcraft - The How & Why Library - Vol 13 Mathemagic
Childcraft The How Why Library Vol 13 Mathemagic Author:Various Childcraft Encylopedia series, Volume #13 "Mathemagic" Chapter headings: (1) Puzzle fun, (2) Take a Number, (3) Fingers, Pebbles & Wiggly Marks, (4) What can you do with numbers, (5) What are your chances, (6) How long, how fast, how hot, how heavy, (7) Points, lines, shapes and designs, (8) People who work with numbers and shapes