Pas de rekenregels toe en bereken
- \(\log 80000 - \log80\)
- \(\log 2{,}5 + \log0{,}4\)
- \(\log 20000 - \log200\)
- \(\log 2{,}5 - \log250\)
- \(\log 10 + \log1\)
- \(\log 50 + \log0{,}0002\)
- \(\log 80 + \log0{,}000125\)
- \(\log 2500000 - \log250\)
- \(\log 500 - \log50\)
- \(\log 80 + \log12{,}5\)
- \(\log 5 + \log0{,}2\)
- \(\log 20 + \log5\)
Pas de rekenregels toe en bereken
Verbetersleutel
- \(\log 80000 - \log80\\ = \log(80000 : 80 )
\\ = \log ( 1000)
\\ =3\)
- \(\log 2{,}5 + \log0{,}4\\ = \log(2{,}5 \cdot 0{,}4 )
\\ = \log ( 1)
\\ =0\)
- \(\log 20000 - \log200\\ = \log(20000 : 200 )
\\ = \log ( 100)
\\ =2\)
- \(\log 2{,}5 - \log250\\ = \log(2{,}5 : 250 )
\\ = \log ( 0{,}01)
\\ =-2\)
- \(\log 10 + \log1\\ = \log(10 \cdot 1 )
\\ = \log ( 10)
\\ =1\)
- \(\log 50 + \log0{,}0002\\ = \log(50 \cdot 0{,}0002 )
\\ = \log ( 0{,}01)
\\ =-2\)
- \(\log 80 + \log0{,}000125\\ = \log(80 \cdot 0{,}000125 )
\\ = \log ( 0{,}01)
\\ =-2\)
- \(\log 2500000 - \log250\\ = \log(2500000 : 250 )
\\ = \log ( 10000)
\\ =4\)
- \(\log 500 - \log50\\ = \log(500 : 50 )
\\ = \log ( 10)
\\ =1\)
- \(\log 80 + \log12{,}5\\ = \log(80 \cdot 12{,}5 )
\\ = \log ( 1000)
\\ =3\)
- \(\log 5 + \log0{,}2\\ = \log(5 \cdot 0{,}2 )
\\ = \log ( 1)
\\ =0\)
- \(\log 20 + \log5\\ = \log(20 \cdot 5 )
\\ = \log ( 100)
\\ =2\)