Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 200 + \log0,005\)
2. \(\log 25 + \log4\)
3. \(\log 20000 - \log20\)
4. \(\log 0,4 + \log250\)
5. \(\log 1000 - \log1\)
6. \(\log 25 + \log0,004\)
7. \(\log 5 + \log2000\)
8. \(\log 25 - \log25\)
9. \(\log 400000 - \log40\)
10. \(\log 100 + \log10\)
11. \(\log 0,2 - \log20\)
12. \(\log 0,004 - \log0,4\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 200 + \log0,005\\ = \log(200 \cdot 0,005 ) \\ = \log ( 1) \\ =0\)
2. \(\log 25 + \log4\\ = \log(25 \cdot 4 ) \\ = \log ( 100) \\ =2\)
3. \(\log 20000 - \log20\\ = \log(20000 : 20 ) \\ = \log ( 1000) \\ =3\)
4. \(\log 0,4 + \log250\\ = \log(0,4 \cdot 250 ) \\ = \log ( 100) \\ =2\)
5. \(\log 1000 - \log1\\ = \log(1000 : 1 ) \\ = \log ( 1000) \\ =3\)
6. \(\log 25 + \log0,004\\ = \log(25 \cdot 0,004 ) \\ = \log ( 0,1) \\ =-1\)
7. \(\log 5 + \log2000\\ = \log(5 \cdot 2000 ) \\ = \log ( 10000) \\ =4\)
8. \(\log 25 - \log25\\ = \log(25 : 25 ) \\ = \log ( 1) \\ =0\)
9. \(\log 400000 - \log40\\ = \log(400000 : 40 ) \\ = \log ( 10000) \\ =4\)
10. \(\log 100 + \log10\\ = \log(100 \cdot 10 ) \\ = \log ( 1000) \\ =3\)
11. \(\log 0,2 - \log20\\ = \log(0,2 : 20 ) \\ = \log ( 0,01) \\ =-2\)
12. \(\log 0,004 - \log0,4\\ = \log(0,004 : 0,4 ) \\ = \log ( 0,01) \\ =-2\)