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要培养学生的计算能力,就必须明确教材在各个阶段的内容和要求,以及计算在各个阶段之间的内在联系。下面结合小学三年级教学内容,谈谈自己的体会。首先,要加强学生口算能力的培养。口算能力的培养是一个较为长期的任务,它贯穿在整个小学数学教学过程之中。三年级主要口算积在百以上的乘法。安排练习时,要由浅入深,由易到难,可分为个位进位、十位进位、连续进位以及被乘数和乘数末尾有0的乘法等几个阶段(如42×3→93×6→67×7→130×5→23×40→660×30)。对一些特殊题目如25×4,125×8,37×0,274×1,100×100,27×0×54,380×1000,10×2700等也应经常穿插在各个阶段进行练习。在每一阶段的口
To develop students' computing abilities, it is necessary to clarify the content and requirements of teaching materials in all stages and to calculate the internal relations between the various stages. The following combination of third grade primary school teaching content, talk about their own experience. First of all, we should strengthen the training of students' oral calculation ability. Migrants ability to develop is a more long-term task, which runs through the entire process of primary school mathematics teaching. Third grade main mouth count more than one hundred multiplication. Arrangements for practice, from shallow to deep, from easy to difficult, can be divided into a bit carry, ten carry, continuous carry and multiplicand multiplier at the end of the multiplication of 0 and several stages (such as 42 × 3 → 93 × 6 → 67 × 7 → 130 × 5 → 23 × 40 → 660 × 30). For some special topics such as 25 × 4,125 × 8,37 × 0,274 × 1,100 × 100,27 × 0 × 54,380 × 1000,10 × 2700, etc. should also often interspersed in various stages of practice. At every stage of the mouth