Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 0,002 - \log0,2\)
2. \(\log 1000 - \log10\)
3. \(\log 80 + \log1,25\)
4. \(\log 4000 - \log0,4\)
5. \(\log 0,5 - \log5\)
6. \(\log 2 - \log2\)
7. \(\log 20 + \log5\)
8. \(\log 500000 - \log500\)
9. \(\log 20 + \log0,0005\)
10. \(\log 8 + \log0,00125\)
11. \(\log 25000 - \log2,5\)
12. \(\log 0,8 - \log80\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 0,002 - \log0,2\\ = \log(0,002 : 0,2 ) \\ = \log ( 0,01) \\ =-2\)
2. \(\log 1000 - \log10\\ = \log(1000 : 10 ) \\ = \log ( 100) \\ =2\)
3. \(\log 80 + \log1,25\\ = \log(80 \cdot 1,25 ) \\ = \log ( 100) \\ =2\)
4. \(\log 4000 - \log0,4\\ = \log(4000 : 0,4 ) \\ = \log ( 10000) \\ =4\)
5. \(\log 0,5 - \log5\\ = \log(0,5 : 5 ) \\ = \log ( 0,1) \\ =-1\)
6. \(\log 2 - \log2\\ = \log(2 : 2 ) \\ = \log ( 1) \\ =0\)
7. \(\log 20 + \log5\\ = \log(20 \cdot 5 ) \\ = \log ( 100) \\ =2\)
8. \(\log 500000 - \log500\\ = \log(500000 : 500 ) \\ = \log ( 1000) \\ =3\)
9. \(\log 20 + \log0,0005\\ = \log(20 \cdot 0,0005 ) \\ = \log ( 0,01) \\ =-2\)
10. \(\log 8 + \log0,00125\\ = \log(8 \cdot 0,00125 ) \\ = \log ( 0,01) \\ =-2\)
11. \(\log 25000 - \log2,5\\ = \log(25000 : 2,5 ) \\ = \log ( 10000) \\ =4\)
12. \(\log 0,8 - \log80\\ = \log(0,8 : 80 ) \\ = \log ( 0,01) \\ =-2\)