Measurement and Data: Measuring Area of Figures Using Counting Squares (CCSS.3.MD.5)
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Common Core 3rd Grade Math › Measurement and Data: Measuring Area of Figures Using Counting Squares (CCSS.3.MD.5)
Floor tiles are 1-foot squares. How many tiles are needed to cover a 6 by 9 foot room?
30 tiles
54 tiles
15 tiles
6 tiles
Explanation
Each tile covers 1 square foot, so the number of tiles equals the area: $6 \times 9 = 54$ tiles. 30 is the perimeter number, 15 is a multiplication/choice error, and 6 uses only one dimension.
A rectangular room is 12 feet long and 4 feet wide. How many square feet of carpet are needed to cover the floor?
32 feet
44 square feet
48 square feet
48 feet
Explanation
Area = $12 \times 4 = 48$ square feet. 32 feet is the perimeter, not area; 44 square feet is a multiplication mistake; 48 feet has the wrong unit (should be square feet).
A rectangular garden is 8 feet by 5 feet. How many square feet is the garden?
40 square feet
26 feet
13 square feet
45 square feet
Explanation
Area = length × width, so $8 \times 5 = 40$ square feet. 26 feet is the perimeter, not area; 13 square feet comes from adding, not multiplying; 45 square feet is a multiplication mistake.