实施新课程改革以来,教材加强了口算和估算的教学,提倡算法多样化,同时删减了一些繁难的计算,淡化了计算的速度要求,因此常常会有教师反映,现在的学生计算正确率下降,计算能力退化,等等。实际上,计算在小学数学的各个年段中都占有很大的比重。计算能力不仅仅是小学生必须形成的基本技能,更是一种数学的思维能力。这种能力不是单一的、孤立的,它的形成也不是一蹴而就的,还是需要教师针对不同年段儿童 Since the implementation of the new curriculum reform, textbooks have strengthened the teaching of numeracy and estimation, advocated the diversification of algorithms, and at the same time, eliminated some complicated calculations and reduced the speed requirements of calculation. Therefore, teachers often reflect that the calculation accuracy of students is now declining , Computing power degradation, and more. In fact, computing accounts for a large share of all phases of elementary mathematics. Computational ability is not only the basic skills that pupils must form, but also a kind of mathematical thinking ability. This ability is not a single, isolated, and its formation is not a one-stop, or need teachers for different stages of children