Use four rectangles that are 5cm long and 3cm wide to make a big square. How can you spell them? First, draw different spelling methods,

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• 1. Use two rectangles 4 cm long and 3 cm wide to form a large rectangle. What is the circumference of the large rectangle?
• 2. Use four rectangles of the same size and a small square to make a large square with a side length of 13dm. What is the perimeter of each rectangle
• 3. Use four rectangles of the same size and a small square to form a large square with a side length of 16 meters, and calculate the perimeter of each rectangle
• 4. Use 9 squares with side length of 4cm to make a big square. How many centimeters is the perimeter of the big square/
• 5. There are two square tablecloths, both of which are 1m long. Xiaoming's bought a 1.3 square tablecloth, you can put it together, there is no cloth left! Three methods
• 6. A square tablecloth with a side length of a is laid on a flat surface with a diameter of B (a > b). If the maximum length of the tablecloth drooping at the four corners is equal, what is the maximum length?
• 7. The perimeter of the round table cloth is 3.768 meters. Please design a square tablecloth. The edge of the tablecloth should be at least 40 cm lower than the edge of the table. What is the side length of this tablecloth?
• 8. The diameter of the round dining table is 2 meters and the height is 0.8 meters. The four corners of the square plastic tablecloth on the table just touch the area of the plastic tablecloth on the ground
• 9. A square tablecloth with side length a is placed on a round table with diameter B (a > b). If the maximum length of the four corners of the tablecloth is equal, the maximum length is () A. 2a−bB. 2a−b2C. 22a−b2D. 22a−b
• 10. A round dining table, the diameter of the round table is 2 meters, the table is covered with a round tablecloth, the tablecloth from the table hanging distance is 40 cm Glass round turntable (placed in the center of the table). The edge of the turntable is 30 cm away from the edge of the round table
• 11. How to make a big rectangle with four rectangles 5cm long and 3cm wide? Calculate the perimeter of the rectangle
• 12. How many kinds of rectangles can be made out of 24 square pieces of paper with 1cm sides? Row by row, what is the maximum perimeter of a rectangle?
• 13. How many different spellings are there? What are their girth? Spell them, and fill in the table ───────────── Length / cm ───────────── Width / cm ───────────── Circumference / cm ─────────────……
• 14. Use 12 squares with side length of 1 decimeter to spell a rectangle. How many spelling methods are there for this rectangle? What are their perimeter? I am a primary school student
• 15. Use 18 same small squares to make a rectangle. Use 18 squares each time. There are several kinds of spelling
• 16. Use eight small squares to make a rectangle, several spelling methods
• 17. How many different spelling methods are there to make a large rectangle with 18 small squares of one square centimeter? What is the circumference of the rectangle with the largest circumference
• 18. How many centimeters is the circumference of the two rectangles that are 6 cm long and 4 cm wide? (think about it. There are several spellings.)
• 19. Use 210 small squares with side length of 2 cm to make a rectangle. How many spelling methods do you share?
• 20. Use 18 identical small squares to form a rectangle, which can have______ There is a spelling