数学推理是数学计算的基本思维方式,也是人们学习和生活中经常使用的思维方式。推理一般包括合情推理和演绎推理,将其应用于计算中,需要学生拥有丰富的计算经验,两者相辅相成。计算法则教学属于小学数学新课程标准中数与代数学习领域的内容,小学阶段培养小学生的运算能力尤为重要,而计算法则是计算的方法和规则,推理存在于生活的方方面面,应用非常广泛,在计算法则教学中发展小学生初步的推理能力有助于学生后续的数 Mathematical reasoning is the basic way of thinking of mathematical calculation, but also the way of thinking that people often use in their study and life. Inference generally includes affective reasoning and deductive reasoning, applying it to calculations, requiring students to have extensive computational experience that complements each other. The teaching of law of calculation belongs to the field of mathematics and algebra in the new curriculum standard of primary school mathematics. It is particularly important to cultivate pupils’ computing abilities in primary school. Calculation law is the method and rule of calculation. Reasoning exists in all aspects of life. It is widely used in The development of elementary students’ reasoning ability in the teaching of law of calculation helps students follow-up numbers