Developing essential understanding of number and numeration for teaching mathematics in prekindergarten - grade 2
| Prif Awdur: | |
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| Awduron Eraill: | , , |
| Fformat: | Cit |
| Iaith: | English |
| Rhifyn: | 3a ed., reimpresión |
| Cyfres: | Essential Understanding
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| Pynciau: |