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教材没有编排的算式,敢不敢让一年级孩子写?

  • 2026-09-22 14:30:15
教材没有编排的算式,敢不敢让一年级孩子写?
2023年秋季新接一年级,那时候还用的老教材,10月份写过一篇关于一年级小朋友理解使用等号困难的记录。
“等号”为什么这么难?
文中吐槽孩子把得等号=当得数键:( )=3+2填不出、5-1=4-2=1-1=0连等也不明白。
最近翻2024人教版一年级上册加法页,感觉教材编写者在试一试里,给等号正名了
今天接着旧文,就新旧教材对比、相等模型以及等号关系意义,以及我的一些小想法记录一下。
▶老教材:等号=算完

老版加法起始课:3个橙气球+1个蓝气球→圆点图→3+1=4
逻辑链是:看情境 → 合并 → 数出4 → 写=,等号在这里是运算结果标记,即左边算,右边接答案。
孩子形成的前概念:=读等于,意思是算出后面那个数。我旧文说的误区,根儿就在这儿。
▶新教材试一试:等号=天平横梁

新版例1仍是气球合并(3+1=4);紧接试一试:
果果3个桃,花花4个桃,一一对应虚线框:果果再摘1个→和花花同样多,列式仍是3+1=4,不过凸显等号表示两边数量相等。
关键差异
老版:先算3+1=?再写=
试一试:先比多少→确认两边同等→才落笔写=
这就是加法中的相等模型,不是单纯的部分+部分=整体,而是A补上Δ = B。这一处把=从运算命令扭成等价关系符,3+()=4,是早期代数思维启蒙

▶我想给新教材加码:左右翻转对比

教材写3+1=4,我现在再看教材,有个大胆的想法,再补一组:
左图:花花4桃(完整)
右图:果果3桃+虚线框1
问题不变,对照图让孩子列:4=3+1
然后比较:3+1=4,4=3+1
问:两个算式哪儿不一样?说的同一件事吗?
没有尝试,不知道一年级小孩会怎么想怎么回答?
这样孩子就不会认为等号右边必须是一个数,完全也可以是一个式子,将来2+2=1+3  ,5-1=3+1这样的不表达应该也可以水到渠成。

▶接回旧文:预防优于纠偏

旧文曾提到天平、连等、非传统格式□=2+4,在使用新教材时如果翻转左右进行微重构,起始课就见两边等价写法,那么操作就不易固化,用“先比后写=”替代“先算后写=”,体现等号的关系意义,进一步建立相等模型。
所以,我想,以前教加法:合起来→得数,现在教加法:合并建模一次,相等建模一次,给等号的关系意义埋种。
当然,教材暂时没敢把4=3+1印上去,也可能顾虑书写认读负担,但留了“试一试”的口子,是不是可以再试得大胆一些?
2026秋新教材各年级上册数学作业本
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小程序同步更新各科学习资源:

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