00655    a2200205   4500001000700000020001800007040003200025100002100057245002400078250001300102260000800115300001000123362000900133520021000142650002000352650001400372650001800386650001600404650002900420124495  a9780545211451  cEscola Canadense de Niteroi  aGoldstone, Bruce10aGreater estimations  a1st. ed.  aUSA  a32 p.0 a2008  aHow many rubber duckies are on the cover of this book? You could count each one―or you could estimate. An estimate is a good guess. Are there more than ten rubber ducks? Are there fewer than a thousand?  4aMath Operations 4aEstimates 4aMath for kids 4aNon-Fiction 4aMathematics (Literature)