Use two rectangles 4 cm long and 3 cm wide to form a large rectangle. What is the circumference of the large rectangle?

Use two rectangles 4 cm long and 3 cm wide to form a large rectangle. What is the circumference of the large rectangle?

(1) The length of a large rectangle is: 4 + 4 = 8 (CM), the perimeter of a large rectangle is: (8 + 3) × 2, = 11 × 2, = 22 (CM); (2) the length of a large rectangle is: 3 + 3 = 6 (CM), the perimeter of a large rectangle is: (6 + 4) × 2, = 10 × 2, = 20 (CM); a: the perimeter of a large rectangle may be 22 cm or 20 cm