《数学课程标准》指出:“掌握数的基本的运算,应重视口算,加强估算,鼓励算法多样化;能熟练地口算20以内的加减法,会口算百以内的加减法,提倡算法多样化”现在一线教学的数学教师经常感叹,学生的计算能力每况愈下。对学习者而言,计算技能是内在的能力,是计算器所不能替代的。学生计算能力的高低,在一定程度上又取决于熟练的口算技能技巧。在第一学段,提高学生的口算能力,能更好地培养学生的数学思维能力,发展他们的数学心智。本文结 Mathematical Curriculum Standards states: “To grasp the basic operations of numbers, emphasis should be placed on port counts, estimates should be strengthened to encourage diversification of algorithms. Skillful additions and subtractions within the range of 20 can be considered as additions and subtractions within hundreds, and algorithms are promoted Diversification ”Math teachers in front-line teaching often lament that students’ computing power is deteriorating. For learners, computational skills are inherent capabilities that calculators can not replace. The level of computational skills of students, to a certain extent, depends on skilled oral arithmetic skills. In the first semester, improving students ’numeracy skills can better develop students’ mathematical thinking ability and develop their mathematical mind. This article conclusion