Bar modelling: add 3 small numbers up to 20
Add three small numbers with totals up to 20, with the help of bar models.
4 pages
Bar modelling: add 3 small numbers up to 20
Add three small numbers with totals up to 20, with the help of bar models.
![Preview of 'Bar modelling: add 3 small numbers up to 20'](https://content.urbrainy.com/7104/754823285/thumbnail_xlarge/8340_1.png)