近似數

8. 近似數-01

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點擊下面紅字下載:

近似數

1. 將附件打印出來;

2. 讓學生將數字在三種標尺中標出。

3. 測量數字所在的位置與相鄰數字間的距離,求得最近的相近數。

如例子1567,從圖中可以看出,與它相近的十位數是1570,百位數是1600,千位數是2000。

4. 當求其它相近數時,可與此為參考製作標尺,通過數字與臨近數字的觀察,找出不同位數上的相近數

N0.8 Numbers

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