Compound Shapes: Shapes made up of multiple rectangles or squares
Area Subtraction: Finding area by subtracting smaller areas from larger ones
Multi-step Problems: Problems requiring multiple calculations
Area Relationships: Understanding how areas relate to each other
• Rule 1: Break complex shapes into simpler rectangles
• Rule 2: Use area addition/subtraction to find shaded regions
• Rule 3: Apply area concepts to real-world scenarios
• Rule 4: Work systematically through multi-step problems
- Analyze: Identify the type of problem and what's being asked
- Plan: Break down complex problems into smaller steps
- Execute: Perform calculations for each step
- Combine: Add or subtract areas as needed
- Verify: Check if the answer is reasonable
Step 1: Find the area of the entire garden
Area of garden = 15 × 8 = 120 square feet
Step 2: Find the area of the flower bed
Area of flower bed = 4 × 4 = 16 square feet
Step 3: Subtract to find the remaining area
Remaining area = 120 - 16 = 104 square feet
Answer: 104 square feet
Step 1: Find area of first section
Area of section 1 = 10 × 12 = 120 square feet
Step 2: Find area of second section
Area of section 2 = 8 × 6 = 48 square feet
Step 3: Add the areas together
Total area = 120 + 48 = 168 square feet
Answer: 168 square feet
Step 1: Find the length of the field
Area = Length × Width
300 = Length × 15
Length = 300 ÷ 15 = 20 yards
Step 2: Find the perimeter (fencing needed)
Perimeter = 2 × (Length + Width)
Perimeter = 2 × (20 + 15) = 2 × 35 = 70 yards
Answer: 70 yards of fencing needed
Step 1: Find the area of the first garden
Area of garden 1 = 18 × 10 = 180 square feet
Step 2: Since areas are equal, area of garden 2 = 180 square feet
Step 3: Use area formula for garden 2
180 = 15 × Width
Width = 180 ÷ 15 = 12 feet
Answer: Width is 12 feet
Step 1: Find the area of the entire park
Area of park = 40 × 30 = 1,200 square meters
Step 2: Find dimensions of the inner area (without path)
Inner length = 40 - 2 - 2 = 36 meters
Inner width = 30 - 2 - 2 = 26 meters
Step 3: Find area of inner area
Area of inner area = 36 × 26 = 936 square meters
Step 4: Find area of path
Area of path = 1,200 - 936 = 264 square meters
Answer: 264 square meters
Let width = w
Then length = w + 3
Area = length × width
70 = (w + 3) × w
For grade 4: Use trial and error
Try w = 7: (7+3) × 7 = 10 × 7 = 70 ✓
So width = 7 feet, length = 10 feet
Answer: Width = 7 feet, Length = 10 feet
Step 1: Find length of first piece
48 = length₁ × 6
length₁ = 48 ÷ 6 = 8 meters
Step 2: Find length of second piece
60 = length₂ × 6
length₂ = 60 ÷ 6 = 10 meters
Step 3: Find length of third piece
72 = length₃ × 6
length₃ = 72 ÷ 6 = 12 meters
Step 4: Find total length
Total length = 8 + 10 + 12 = 30 meters
Answer: 30 meters
• Solving multi-step area problems
• Working with compound shapes
• Applying area concepts to real-world scenarios
• Using area relationships to solve for unknowns
• Converting between different measurement units