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Grade 2 Math · World 9: Cookie Castle · Level 78
Rows and Columns
Build and describe arrays (up to 5 × 5).
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 78
- Things in neat rows and columns make an array, like cookies on a baking tray.
- Rows go across, like rows of seats. This array has 3 rows.
- Columns go up and down, like the columns of a building. This array has 4 columns. So it's 3 rows of 4.
- Your turn! Use the buttons to make 2 rows of 5.
- Arrays in Grade 2 have up to 5 rows and up to 5 columns. Look for them on egg cartons and muffin pans!
Georgia's K-12 Mathematics Standards:
- 2.NR.3.2 — Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.