Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 4 + \log250\)
2. \(\log 2 - \log20\)
3. \(\log 5000 - \log5\)
4. \(\log 2{,}5 + \log400\)
5. \(\log 2 + \log50\)
6. \(\log 250 - \log250\)
7. \(\log 0{,}5 + \log20000\)
8. \(\log 80 + \log12{,}5\)
9. \(\log 80 + \log0{,}00125\)
10. \(\log 0{,}8 + \log125\)
11. \(\log 100 + \log0{,}001\)
12. \(\log 400 - \log4\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 4 + \log250\\ = \log(4 \cdot 250 ) \\ = \log ( 1000) \\ =3\)
2. \(\log 2 - \log20\\ = \log(2 : 20 ) \\ = \log ( 0{,}1) \\ =-1\)
3. \(\log 5000 - \log5\\ = \log(5000 : 5 ) \\ = \log ( 1000) \\ =3\)
4. \(\log 2{,}5 + \log400\\ = \log(2{,}5 \cdot 400 ) \\ = \log ( 1000) \\ =3\)
5. \(\log 2 + \log50\\ = \log(2 \cdot 50 ) \\ = \log ( 100) \\ =2\)
6. \(\log 250 - \log250\\ = \log(250 : 250 ) \\ = \log ( 1) \\ =0\)
7. \(\log 0{,}5 + \log20000\\ = \log(0{,}5 \cdot 20000 ) \\ = \log ( 10000) \\ =4\)
8. \(\log 80 + \log12{,}5\\ = \log(80 \cdot 12{,}5 ) \\ = \log ( 1000) \\ =3\)
9. \(\log 80 + \log0{,}00125\\ = \log(80 \cdot 0{,}00125 ) \\ = \log ( 0{,}1) \\ =-1\)
10. \(\log 0{,}8 + \log125\\ = \log(0{,}8 \cdot 125 ) \\ = \log ( 100) \\ =2\)
11. \(\log 100 + \log0{,}001\\ = \log(100 \cdot 0{,}001 ) \\ = \log ( 0{,}1) \\ =-1\)
12. \(\log 400 - \log4\\ = \log(400 : 4 ) \\ = \log ( 100) \\ =2\)