To solve this problem, we need to find the area of each square. The formula for the area of a square is:
Area = side × side
Let’s go step by step for each square.
---
First Square: Side = 7.5 cm
Area = 7.5 × 7.5
Let’s calculate:
7.5 × 7.5 = (7 + 0.5) × (7 + 0.5) = 49 + 2×3.5 + 0.25 = 49 + 7 + 0.25 =
56.25
Or directly:
7.5 × 7.5 = 56.25 cm²
✔ First answer:
56.25 cm²
---
Second Square: Side = 8.0 cm
Area = 8.0 × 8.0 =
64.0 cm²
✔ Second answer:
64.0 cm²
---
Third Square: Side = 6.0 cm
Area = 6.0 × 6.0 =
36.0 cm²
✔ Third answer:
36.0 cm²
---
Fourth Square: Side = 3.8 cm
Area = 3.8 × 3.8
Let’s compute:
3.8 × 3.8 = (4 - 0.2) × (4 - 0.2) = 16 - 2×0.8 + 0.04 = 16 - 1.6 + 0.04 =
14.44
Or directly:
3.8 × 3.8:
Multiply 38 × 38 = 1444 → since there are two decimal places total (one in each 3.8), move decimal two places left →
14.44
✔ Fourth answer:
14.44 cm²
---
All calculations checked and verified.
Final Answer:
56.25 cm², 64.0 cm², 36.0 cm², 14.44 cm²
Parent Tip: Review the logic above to help your child master the concept of area 3rd grade worksheet.
