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小小生活家-学生版（2025版）
学习有效期 长期有效
简介
20以内的退位减法应该如何计算？20以内的退位减法与进位加法有什么联系？在本次活动中，学生使用水果模型、礼盒进行实验，探究20以内的退位减法的算理；利用平十法、拆十法等方法完成20以内的退位减法的计算，并总结20以内的退位减法的规律技巧，为理解后续的计算学习积累活动经验。
学习目录
购买完成后即可查看课程目录～
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