數學結構問題

2006-11-15 4:50 am
.
1/3 = 0.3
.
1/3x3 = 0.9
.
1 = 0.9

?

回答 (3)

2006-11-15 5:02 am
✔ 最佳答案
yes it is a bit nonsense see below:

1/3 = 0.3333333333333333333333333333

1/3 * 3 = 0.333333333333333333333333333333 * 3

so 1 = 0.999999999999999999999999999

because 0.99999999999999999 is similar to 1 and

1/3 is not only 0.33333333333333333333333333333333 but lots of

3 so it will cause this.

like 1/9 = 0.1111111111111111111111111111

1/9 * 9 = 0.1111111111111111111111111111 * 9

so again 1 = 0.999999999999999999999999999

they are special no.s
參考: me
2006-11-15 5:00 am
1/3 = 0.3333......
1/3x3 =1(3同3約左)
你條問題本身都錯
參考: 我
2006-11-15 4:59 am
should be typing error
.
should be 1/3 equal to 0.3
.
1=0.9 --------(1)

(1) x 10
.
10=9.9 ------------(2)

(2) - (1)

9 = 9 which is trivial

2006-11-14 21:00:54 補充:
not typing error........sorry


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