Question 1: Calculate the area of the remaining shape after subtracting the smaller rectangle from the larger one. The larger rectangle measures 12 cm by 8 cm, and the smaller rectangle measures 4 cm by 3 cm.

Answer: 78

Question 2: A composite shape consists of a rectangle measuring 15 cm by 10 cm, with a square of side 4 cm removed from one corner. Find the total area after subtracting the square.

Answer: 146

Question 3: Subtract the area of a circle with radius 5 cm from a square of side 12 cm. (Use π ≈ 3.14).

Answer: 47.4

Question 4: A large rectangular garden measures 30 m by 20 m. A pond measuring 8 m by 6 m is to be dug out of one corner. What is the area of the garden after the pond is removed?

Answer: 576

Question 5: Construct a rectangle with an area of 48 cm². The length should be 8 cm. What is the width?

Answer: 6

Question 6: A composite shape has a total area of 84 cm². If a rectangle of 28 cm² is removed, what is the remaining area?

Answer: 56

Question 7: A triangle has a base of 10 cm and a height of 6 cm. Find its area. Then, subtract an area of 12 cm² representing a smaller triangle within it.

Answer: 18

Question 8: A rectangular room measuring 5 m by 4 m has a section of 2 m by 2 m removed for a closet. What is the remaining area of the room?

Answer: 16

Question 9: A square garden has an area of 121 m². A smaller square is cut out, with an area of 25 m². Find the remaining garden area.

Answer: 96

Question 10: Identify and correct the mistake in this subtraction problem: The area of a rectangle is 50 cm². If a square of area 20 cm² is to be subtracted, the remaining area is calculated as 25 cm².

Answer: Incorrect; 50 - 20 = 30, not 25

Question 11: Challenge: A composite figure has dimensions such that its total area is 200 cm². A section of 75 cm² is removed. If the remaining area is doubled, what is the new total area?

Answer: 250