用window下面的小算盤=.=.....

打開之後，用檢視→工程型，

在key"50"之後，按下"log"，

就會出現"1.6989700043360188047862611052755......"

也就是說，

log50 = log10 + log5 = 1 +0.69897.....

log2到1og9的常用數值小弟已經忘了....

用小算盤key出來是這樣....

log2=0.30102999566398119521373889472449

log3=0.47712125471966243729502790325512

log4= log2 + log2 =0.60205999132796239042747778944899

log5=0.69897000433601880478626110527551

log6= log2 + log3 =0.77815125038364363250876679797961

log7=0.84509804001425683071221625859264

log8= log2 + log2 + log2 =0.90308998699194358564121668417348

log9= log3 + log3 =0.95424250943932487459005580651023

當然log1=0；log10=1


小弟學校畢業已久，已經只會賣東西而什麼都不會，

在此亂講一通...

就　這樣