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从学习数学,提高计算能力这个角度来说,口算是估算和笔算的基础,口算能力差,就会影响到估算、笔算的速度和正确率,影响计算技能的形成。所以,口算是一切计算的基础,没有一个好的口算能力,提高计算能力就变得不切实际,而学习数学如果连基本的计算能力都不具备,要想发展基础知识、综合应用能力就会举步维艰,困难重重。我在20以内加减法的教学实践中,为了提高学生的口算能力,根据错误资源,实行个别纠错,提升口算能力。在20以内加减法口算教学中,我们发现有一部分的题目
From the perspective of learning mathematics and improving computational ability, port arithmetic is the basis of estimation and pen calculation. Poor port arithmetic ability will affect the speed of estimation and pen calculation and the accuracy of calculation, thus affecting the formation of computational skills. Therefore, the calculation is the basis of all calculations, not a good ability to calculate the ability to improve the computing power becomes impractical, and learning mathematics if not even the basic computing power, in order to develop basic knowledge, comprehensive application capabilities will Difficult, difficult. In my teaching practice of addition and subtraction within 20, in order to improve students’ ability to calculate words and sentences, I implemented individual error correction according to wrong resources and improved my ability to communicate words and sentences. In the addition and subtraction within 20 mouth calculation teaching, we found that there is a part of the subject