Sequences were always a favorite of mine. I really like working with them. Below is a list of how Number Sense uses sequences.
 | (*) Adding Sequences in the Form: 1 + 2 +...+ n |
| (*) Adding Sequences in the Form: 1 + 3 +...+ 2n-1 |
| (**) Adding Geometric Sequences: a + (a + b) +...+ (a + bn) |
| (***) Adding Sequences in the Form: 12 + 22 +...+ n2 |
| (***) Adding Sequences in the Form: 13 + 23 +...+ n3 |
| (***) Adding Sequences in the Form: 1/a + 1/a2 +...+ 1/an |
| (***) Adding Infinite Sequences in the Form: a + a/b + a/b2 + ... |
| (**) Finding the Next Term in the Sequence |