TY  - GEN
AU  - Goldstone, Bruce
TI  - Greater estimations
SN  - 9780545211451
CY  - USA
KW  - Math Operations
KW  - Estimates
KW  - Math for kids
KW  - Non-Fiction
KW  - Mathematics (Literature)
N2  - 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?
ER  -