Subtracting tens and ones
Subtracting 2-digit numbers, but no 'decomposition' needed. A good mental arithmetic exercise.
5 pages
Subtracting tens and ones
Subtracting 2-digit numbers, but no 'decomposition' needed. A good mental arithmetic exercise.
![Preview of 'Subtracting tens and ones'](https://content.urbrainy.com/657/203415270/thumbnail_xlarge/6849_1.png)