Math diary, a third-grade elementary school student, calculated the circumference in the week of June 5438+065438+1October 27th, 2009. I remember once, in order to consolidate my understanding of rectangular squares, my mother specially asked a question: "Put two rectangles with a length of 8 cm and a width of 6 cm into a big rectangle. What is the circumference of this big rectangle? " I took out a piece of draft paper and drew this picture first: the calculated circumference is: 4x8 = 32 (cm) 2x6 =12 (cm) 32+12 = 44 (cm). I immediately said to my mother, "I figured it out! Equal to 44 cm. " But mother said, "There is another way." So I drew a picture on the draft. Oh, you can spell it like this, but the circumference is different. 2×8= 16 (cm) 4×6=24 (cm) 16+24=40 (cm). My mother seems to say to me again, "Think about it!" Excerpted from the network