The circumference and area of ​​rectangles and squares-(Shanghai Education Edition) third grade mathematics courseware

(Shanghai Education Edition) The perimeter and area of ​​rectangles and squares in the third grade mathematics A preliminary understanding of the relationship between the perimeter and area of ​​a rectangular square. 2. Knowing that several rectangles have the same perimeter, the closer the length and width, the larger the area. Use 16 small rods to make a rectangle, and find its circumference and area. (A small stick represents 1 meter)

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