The Shark Swimathon: Level 3: Subtracting Two-Digit Numbers (Mathstart: Level 3 (HarperCollins Hardcover))
By Stuart J. Murphy.
Description
Shark Swimathon The Ocean City Sharks have to swim 75 laps by the end of the week, and every day they figure out how many laps are left to go. Swimming and subtraction are all part of the fun! - from Amzon
ISBN(s)
0060280301, 9780060280307
