Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 0,8 + \log0,125\)
2. \(\log 0,02 - \log0,2\)
3. \(\log 20 + \log50\)
4. \(\log 250 + \log0,4\)
5. \(\log 2000000 - \log200\)
6. \(\log 0,2 + \log0,5\)
7. \(\log 0,04 - \log4\)
8. \(\log 100 - \log100\)
9. \(\log 0,8 + \log12500\)
10. \(\log 0,5 + \log2\)
11. \(\log 5 - \log5\)
12. \(\log 50 - \log0,5\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 0,8 + \log0,125\\ = \log(0,8 \cdot 0,125 ) \\ = \log ( 0,1) \\ =-1\)
2. \(\log 0,02 - \log0,2\\ = \log(0,02 : 0,2 ) \\ = \log ( 0,1) \\ =-1\)
3. \(\log 20 + \log50\\ = \log(20 \cdot 50 ) \\ = \log ( 1000) \\ =3\)
4. \(\log 250 + \log0,4\\ = \log(250 \cdot 0,4 ) \\ = \log ( 100) \\ =2\)
5. \(\log 2000000 - \log200\\ = \log(2000000 : 200 ) \\ = \log ( 10000) \\ =4\)
6. \(\log 0,2 + \log0,5\\ = \log(0,2 \cdot 0,5 ) \\ = \log ( 0,1) \\ =-1\)
7. \(\log 0,04 - \log4\\ = \log(0,04 : 4 ) \\ = \log ( 0,01) \\ =-2\)
8. \(\log 100 - \log100\\ = \log(100 : 100 ) \\ = \log ( 1) \\ =0\)
9. \(\log 0,8 + \log12500\\ = \log(0,8 \cdot 12500 ) \\ = \log ( 10000) \\ =4\)
10. \(\log 0,5 + \log2\\ = \log(0,5 \cdot 2 ) \\ = \log ( 1) \\ =0\)
11. \(\log 5 - \log5\\ = \log(5 : 5 ) \\ = \log ( 1) \\ =0\)
12. \(\log 50 - \log0,5\\ = \log(50 : 0,5 ) \\ = \log ( 100) \\ =2\)