Abacus: tens and ones (3)
More work with tens and ones and an abacus.
5 pages
Abacus: tens and ones (3)
More work with tens and ones and an abacus.
![Preview of 'Abacus: tens and ones (3)'](https://content.urbrainy.com/268/1091809578/thumbnail_xlarge/397_1.png)
More work with tens and ones and an abacus.
More work with tens and ones and an abacus.