f.2 maths

√0.25=√(25/100)=(√25) /(√100)=5/10=0.5
√1.69=√(169/100)=(√169) /(√100)=13/10=1.3
√0.0064=√(64//10000)=(√64) /(√10000)=8/100=0.08
- √1.44=- √(144/100)=- [(√144) /(√100)]=- [12/10]=-1.2
- √0.0064=- √(64//10000)=- [(√64) /(√10000)]=- [8/100]=-0.08
- √2.25=- √(225/100)=- [(√225) /(√100)]=- [15/10]=-1.5

2009-01-01 16:46:31 補充：
trachelium_7呢位仁兄，其實可以唔使抄到足！

√0.25]
= √(25/100)
= (√25) /(√100)
= 5/10
= 0.5
_______________________________________________________
√1.69
= √(169/100)
= (√169) /(√100)
= 13/10
= 1.3
_______________________________________________________
√0.0064
= √(64//10000)
= (√64) /(√10000)
= 8/100
= 0.08
_______________________________________________________
- √1.44
= - √(144/100)
= - (√144) /(√100)
= - 12/10
= -1.2
_______________________________________________________
- √0.0064
= - √(64//10000)
= - (√64) /(√10000)
= - 8/100
= -0.08
_______________________________________________________
- √2.25
= - √(225/100)
= - (√225) /(√100)
= - 15/10
= -1.5
_______________________________________________________
besides this kinds method
你可以記低依啲
唔使計鬼死甘耐先得.
2^2 = 4
3^2 = 9
4^2 = 16
5^2 = 25
6^2 = 36
7^2 = 49
8^2 = 64
9^2 = 81
10^2 = 100
11^2 = 121
12^2 = 144
13^2 = 169