

To find out how 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? Those estimates are not very accurate. A great estimate is close...

How 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?