周長(zhǎng)復(fù)習(xí)課Evaluadononly.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL復(fù)習(xí)目標(biāo)通過(guò)練習(xí),進(jìn)一步鞏固長(zhǎng)方形、正方形周長(zhǎng)的計(jì)算方法,并解決簡(jiǎn)單的實(shí)際問(wèn)題。Evaluationonly.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL1.升么叫周長(zhǎng)?繞圖形一周的長(zhǎng)度,叫儆圖形的周長(zhǎng)。不是周長(zhǎng)Valadononry.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL長(zhǎng)2.長(zhǎng)方形的周長(zhǎng)=三(長(zhǎng)+寬)×2長(zhǎng)方形的(長(zhǎng)十寬)=長(zhǎng)方形的周長(zhǎng)÷2長(zhǎng)方形的長(zhǎng)=長(zhǎng)方形的周長(zhǎng)÷2一寬長(zhǎng)方形的寬=長(zhǎng)方形的周長(zhǎng)÷2一長(zhǎng)Valadononry.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL邊長(zhǎng)正方形的周長(zhǎng)=邊長(zhǎng)X4正方形的邊長(zhǎng)=正方形的周長(zhǎng)÷4Valadononry.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL智力沖浪ValadononlychAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL第一關(guān)基礎(chǔ)關(guān)EvaluationonlychAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL、填空(1)長(zhǎng)方形的對(duì)邊(相等),四個(gè)角都是(直角)。(2)正方形的四條邊(都相等),四個(gè)角都是(直角)(3)正方形是(特殊)的長(zhǎng)方形。(4)長(zhǎng)方形的周長(zhǎng)公式是:((長(zhǎng)+寬)×2(5)正方形的周長(zhǎng)公式是:(邊長(zhǎng)×4)Valadononry.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL6計(jì)算長(zhǎng)方形的周長(zhǎng),必須知道它的(和(寘7計(jì)算正方形的周長(zhǎng),必須知道它的(邊長(zhǎng))。8.一個(gè)長(zhǎng)方形的長(zhǎng)是5米,寬是2米,它的周長(zhǎng)是(0米9.一個(gè)正方形的邊長(zhǎng)是8厘米它的周長(zhǎng)是()厘為10已知一個(gè)長(zhǎng)方形的周長(zhǎng)是20厘米,它的一個(gè)長(zhǎng)和一個(gè)寬的和是(10)厘米11已知一個(gè)正方形的周長(zhǎng)是40米,它的邊長(zhǎng)是(10米)。Valadononry.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2019-2019AsposePtyL判斷。對(duì)的在括號(hào)里畫(huà)錯(cuò)的畫(huà)“×”。1.長(zhǎng)方形的周長(zhǎng)比正方形的周長(zhǎng)長(zhǎng)2用三條長(zhǎng)度相等的繩子,分別圍成個(gè)長(zhǎng)方形、一個(gè)正方形和一個(gè)平行四邊形,它們的周長(zhǎng)相等。(<)3.長(zhǎng)方形的周長(zhǎng)=長(zhǎng)+寬×2(×)Valadononry.chAsposeslidesforNET4odientP