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【教学片段】师:0.8×3,你们能用学过的方法算一下吗?还没等老师说完,大部分学生齐说等于2.4。师:2.4是怎么得来的呢?生1:3个0.8是2.4,所以0.8×3等于2.4。生2:我是用0.8+0.8+0.8=2.4算来的。师:还有不同的想法吗?下面没有回应,等了好一会儿,才有一人举手。生3:0.8元等于8角,3个8角等于24角,也就是2.4元,所以0.8×3等于2.4。师:有和他想法一样的吗?下面无人举手。接着课件出示0.8×3=2.4竖式计算方法。(略)
Teaching fragment teacher: 0.8 × 3, can you use the method to calculate? Before waiting for the teacher, most students say equal to 2.4. Teacher: 2.4 is how come? Health 1: 3 0.8 is 2.4, so 0.8 × 3 is equal to 2.4. Health 2: I use 0.8 + 0.8 + 0.8 = 2.4 count. Teacher: Do you have any other ideas? There is no response below. Waiting for a while will we have one hand raised. Health 3: 0.8 yuan is equal to 8 angle, 3 8 angle equal to 24 angle, which is 2.4 yuan, so 0.8 × 3 is equal to 2.4. Teacher: Is it the same as his idea? No one raised his hand below. Then show courseware 0.8 × 3 = 2.4 vertical calculation method. (slightly)