Rekenregels (reeks 1)

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Pas de rekenregels toe en bereken

1. \(\log 500 - \log0,5\)
2. \(\log 50 + \log0,002\)
3. \(\log 200 + \log0,0005\)
4. \(\log 20 - \log2\)
5. \(\log 200 + \log0,005\)
6. \(\log 25000 - \log250\)
7. \(\log 4 - \log40\)
8. \(\log 50 + \log0,2\)
9. \(\log 0,8 - \log8\)
10. \(\log 10 + \log100\)
11. \(\log 80 + \log12,5\)
12. \(\log 0,08 - \log0,8\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 500 - \log0,5\\ = \log(500 : 0,5 ) \\ = \log ( 1000) \\ =3\)
2. \(\log 50 + \log0,002\\ = \log(50 \cdot 0,002 ) \\ = \log ( 0,1) \\ =-1\)
3. \(\log 200 + \log0,0005\\ = \log(200 \cdot 0,0005 ) \\ = \log ( 0,1) \\ =-1\)
4. \(\log 20 - \log2\\ = \log(20 : 2 ) \\ = \log ( 10) \\ =1\)
5. \(\log 200 + \log0,005\\ = \log(200 \cdot 0,005 ) \\ = \log ( 1) \\ =0\)
6. \(\log 25000 - \log250\\ = \log(25000 : 250 ) \\ = \log ( 100) \\ =2\)
7. \(\log 4 - \log40\\ = \log(4 : 40 ) \\ = \log ( 0,1) \\ =-1\)
8. \(\log 50 + \log0,2\\ = \log(50 \cdot 0,2 ) \\ = \log ( 10) \\ =1\)
9. \(\log 0,8 - \log8\\ = \log(0,8 : 8 ) \\ = \log ( 0,1) \\ =-1\)
10. \(\log 10 + \log100\\ = \log(10 \cdot 100 ) \\ = \log ( 1000) \\ =3\)
11. \(\log 80 + \log12,5\\ = \log(80 \cdot 12,5 ) \\ = \log ( 1000) \\ =3\)
12. \(\log 0,08 - \log0,8\\ = \log(0,08 : 0,8 ) \\ = \log ( 0,1) \\ =-1\)