一(上)青岛版数学重点知识点
晓慧老师微信:xiaohui850828晓慧老师QQ:397374903更多复习资料下载:www.xiaohui77.com在一年级上册,五四制青岛版和六三制青岛版所有试题通用,唯一的区别是:在第七单元,五四制增加了一个20以内的退位减法,除此之外,完全一样。 青岛版数学一年级上册知识点读数、写数 1.数位表是从右边起,第一位是个位,第二位是十位。有1个十在十位写1,有2个十在十位写2,有几个一在个位写几。(即:个位上的数表示几个一,十位上的数表示几个十。) 例如:十五写作15,它的十位是1,表示1个十;个位是5,表示5个一。 2.读20以内的数。 顺数:从小到大的顺序:01234…...
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