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Grade 3 Math · World 8: Area and Perimeter Park · Level 72
Area by Multiplying
Find area as length × width.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 72
- The squares make rows, just like an array! This rectangle has 3 rows of 5 squares.
- Count by rows: 5, 10, 15. Or multiply: 3 rows of 5 is 3 × 5, which is 15 square units.
- We don't need every square drawn. Here is only the first row and column: 4 rows of 6. 4 × 6 is 24.
- With just the side lengths, multiply them. 7 feet times 4 feet is 28 square feet.
Georgia's K-12 Mathematics Standards:
- 3.GSR.7.3 — Discover and explain how area can be found by multiplying the dimensions of a rectangle.