“加强估算”是课程标准对小学数学教学明确提出的一项要求。实际教学中,估算教学教什么?怎样教?这是数学教师都在探讨的新问题。下面结合教学体验,谈一谈自己的做法和体会。一、估算要以口算为基础,是口算的拓展和延伸口算是估算的基础,估算能力是在准确、熟练的口算能力的基 “Enhancing estimation” is a clear requirement of curriculum standards for elementary mathematics teaching. In actual teaching, what is the teaching of estimation teaching and how to teach? This is a new problem that mathematics teachers are discussing. The following combination of teaching experience, talk about their own practices and experiences. First, the estimation should be based on the basis of the calculation, which is the basis for the estimation and extension of the calculation and estimation. The estimation capability is based on the accurate and proficient oral calculation ability