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Grade 2 Math · World 9: Cookie Castle · Level 80
Fill a Rectangle with Squares
Split a rectangle into rows and columns of squares and count them.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 80
- We can cover a rectangle with squares that are all the same size, with no gaps and no overlaps.
- The squares make rows and columns, just like an array! Tap each square to count them.
- 3 rows of 4 squares. 4 plus 4 plus 4 is 12 squares!
- Sometimes only the first row and column are drawn. Picture the rest: 4 rows of 5 squares. 5 plus 5 plus 5 plus 5 is 20.
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.