口算训练不仅能为学习笔算打基础,而且能训练学生的思维品质。“九义”教材的突出特点之一是重视口算教学。一方面把口算提到笔算之前教学,另一方面在现行教材的基础上扩展口算的范围,把口算训练贯穿于整套教材各部分的训练之中。 “口算除法”的教学是在学生掌握了乘数是一位数的乘法和用乘法口诀求商的基础上进行的。它包 Mouth arithmetic training can not only lay the foundation for learning writing, but also train students' thinking quality. One of the salient features of the “Nine Meanings” textbook is the emphasis on oral arithmetic. On the one hand, I mentioned the calculation before teaching, on the other hand, based on the current teaching materials to expand the scope of the calculation, the calculation of the word count training throughout the entire teaching material. The teaching of “oral arithmetic” is based on the students having mastered the multiplication of one-digit multipliers and multiplying formulas. It packs