In math, a picture is worth a thousand words!
We add and subtract to 100. We are not borrowing or carrying. To see examples how we do operations in grade two, please have a look at these pictures. Our goals are applying mental math strategies, and showing/explaining or solutions. Do you know the answer? If so, prove it!
We can add tens and ones. We can jump on a number lines in different ways.
For 8+5, we can make ten first, then add the rest.
Here are the math strategies we have been learning this year. Each student has a bookmark with these strategies in their desk for reference:

Math Strategies bookmark.
These are examples from last year. We can use or draw base ten blocks. We can think about tens and ones.
We are also working with 3-dimensional shapes. We can build them. We make connections with 2-dimensional shapes.

Cylindre.