Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 2,5 - \log250\)
2. \(\log 10 - \log10\)
3. \(\log 20 - \log2\)
4. \(\log 100 + \log0,01\)
5. \(\log 0,2 - \log0,2\)
6. \(\log 0,002 - \log0,2\)
7. \(\log 80 - \log0,8\)
8. \(\log 250 + \log0,0004\)
9. \(\log 8 + \log1250\)
10. \(\log 20 + \log50\)
11. \(\log 5 - \log50\)
12. \(\log 50 + \log0,002\)

---

Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 2,5 - \log250\\ = \log(2,5 : 250 ) \\ = \log ( 0,01) \\ =-2\)
2. \(\log 10 - \log10\\ = \log(10 : 10 ) \\ = \log ( 1) \\ =0\)
3. \(\log 20 - \log2\\ = \log(20 : 2 ) \\ = \log ( 10) \\ =1\)
4. \(\log 100 + \log0,01\\ = \log(100 \cdot 0,01 ) \\ = \log ( 1) \\ =0\)
5. \(\log 0,2 - \log0,2\\ = \log(0,2 : 0,2 ) \\ = \log ( 1) \\ =0\)
6. \(\log 0,002 - \log0,2\\ = \log(0,002 : 0,2 ) \\ = \log ( 0,01) \\ =-2\)
7. \(\log 80 - \log0,8\\ = \log(80 : 0,8 ) \\ = \log ( 100) \\ =2\)
8. \(\log 250 + \log0,0004\\ = \log(250 \cdot 0,0004 ) \\ = \log ( 0,1) \\ =-1\)
9. \(\log 8 + \log1250\\ = \log(8 \cdot 1250 ) \\ = \log ( 10000) \\ =4\)
10. \(\log 20 + \log50\\ = \log(20 \cdot 50 ) \\ = \log ( 1000) \\ =3\)
11. \(\log 5 - \log50\\ = \log(5 : 50 ) \\ = \log ( 0,1) \\ =-1\)
12. \(\log 50 + \log0,002\\ = \log(50 \cdot 0,002 ) \\ = \log ( 0,1) \\ =-1\)