We learned more about equations that show an unknown total or unknown addend.

We matched equations to story problems.

We also wrote equations to match story problems.

Lin has 5 bingo chips on her board.
She also has some chips on the table.
All together she has 9 bingo chips.
How many chips does Lin have on the table?

and

We thought about how addition and subtraction are related.

We used both to solve a story problem.

9 students play bingo.
3 students use blue chips to cover their boards.
The other students use yellow chips.
How many students use yellow chips?

Clare writes .
Jada writes .