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在“乘数是两、三位数的乘法”这一单元中,两位数乘多位数是教学的重点。如果学生对两位数乘多位数的知识掌握得好,学习三位数乘多位数就容易得多,因此,本文着重就两位数乘多位数的教学,谈一点肤浅的看法。教好准备课孕伏法则在教学两位数乘多位数之前,为了帮助学生理解用乘数十位上的数去乘被乘数,得到的是多少个“十”这个关键问题。六年制小学数学课本第六册第32页在讲例1之前,特意安排了以下四道准备题:
In the unit “Multiplier is a two-and-three-digit multiplication,” double-digit multiples are the teaching priorities. If students have a good grasp of double-digit and multi-digit knowledge, learning three-digit and multi-digit is much easier, so this article focuses on double-digit and multi-digit teaching to speak a little superficial. Teach to Prepare for a Course of Pregnancy Volt Law Before teaching double-digit multiples, to help students understand how to multiply multiplicands by the number of multiples, you get the crucial question of how many “ten” you want. Six years of primary school mathematics textbook sixth book page 32 in the pre-1, specially arranged the following four preparatory questions: