| Type |  Book |
| ชื่อเรื่อง | Number sense and operations in the primary grades : hard to teach and hard to learn? / edited by Carne Barnett-Clarke ... [et.al.] |
| ISBN | 032500546X (pbk. : acidfree paper) |
| พิมพลักษณ์ | Portsmouth, NH : Heinemann, c2003 |
| รูปเล่ม | vi, 185 p. : ill. ; 24 cm |
| หัวเรื่อง | Arithmetic --Study and teaching (Primary) --Case studies [] |
| | Number concept --Study and teaching (Primary) --Case studies [] |