蘇教版三年級（上冊）數(shù)學(xué)千克和克分數(shù)的初步認識期末復(fù)習(xí)教學(xué)課件

一兩、三位數(shù)乘一位數(shù)··························································1二

千克和克·········································································28三長方形和正方形································································36周長是多少······································································46四兩、三位數(shù)除以一位數(shù)·······················································48五解決問題的策略································································71間隔排列·········································································78六平移、旋轉(zhuǎn)和軸對稱··························································80七分數(shù)的初步認識（一）·······················································87多彩的“分數(shù)條”·····························································96八期末復(fù)習(xí)·········································································98蘇教版三年級上冊千克和克分數(shù)的初步認識（一）整理復(fù)習(xí)1千克和克稱一般物品有多重，常用千克作單位。千克可以用字母“kg”表示。稱比較輕的物品，常用克作單位?？丝梢杂米帜浮癵”表示。1千克＝1000克（質(zhì)量單位）2分數(shù)的初步認識（一）讀作：四分之三分數(shù)線分子分母其中的幾份平均分的份數(shù)平均分比較分數(shù)大小的方法是：分子是1的分數(shù)，分母越小，表示分的份數(shù)越少，其中的1份越大。

分子相同，分母小的分數(shù)大。分成同樣多的份數(shù)，取的份數(shù)越多就越大。分母相同，分子大的分數(shù)越大。分數(shù)的簡單計算：同分母分數(shù)相加減，分母不變，只把分子相加減。

1可以看作是分子分母相同的分數(shù)。1與分數(shù)相減：1.在（）里填合適的單位。（1）一袋大米重25（）。（2）一袋水果大約重3（）。（3）一盒餅干重500（）。（4）一筐土豆重18（）。千克千克克千克隨堂練習(xí)【選自教材第101頁第19題】2.3千克=（）克9000克=（）千克8千克=（）克2000克=（）千克3000980002【選自教材第101頁第20題】3.2個橘子90克，一個橘子45克。50+20+20=90（g）90÷2=45（g）【選自教材第101頁第21題】4.用分數(shù)表示涂色部分，并說說每個分數(shù)的含義。

把圓平均分成4份，涂色部分占其中1份把三角形平均分成3份，涂色部分占其中2份把長方形平均分成5份，涂色部分占其中2份【選自教材第101頁第22題】5.把一張長方形紙對折、再對折……數(shù)一數(shù)每次對折后平均分成的份數(shù)，填在下表里，并說說每份各占這張紙的幾分之幾。

【選自教材第101頁第23題】48416532664對折次數(shù)每次增加1次，平均分成的份數(shù)就等于原來的2倍。6.一塊布的

做上衣，做褲子。你會用不同的顏色在下面的大長方形中表示做上衣的布和做褲子的布嗎？

上衣褲子【選自教材第101頁第