Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 5 + \log0{,}02\)
2. \(\log 250000 - \log25\)
3. \(\log 200000 - \log20\)
4. \(\log 1 - \log100\)
5. \(\log 0{,}08 - \log0{,}8\)
6. \(\log 0{,}2 - \log2\)
7. \(\log 25 + \log0{,}004\)
8. \(\log 5000 - \log50\)
9. \(\log 0{,}5 - \log50\)
10. \(\log 80 + \log0{,}000125\)
11. \(\log 20 + \log5\)
12. \(\log 0{,}4 + \log250\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 5 + \log0{,}02\\ = \log(5 \cdot 0{,}02 ) \\ = \log ( 0{,}1) \\ =-1\)
2. \(\log 250000 - \log25\\ = \log(250000 : 25 ) \\ = \log ( 10000) \\ =4\)
3. \(\log 200000 - \log20\\ = \log(200000 : 20 ) \\ = \log ( 10000) \\ =4\)
4. \(\log 1 - \log100\\ = \log(1 : 100 ) \\ = \log ( 0{,}01) \\ =-2\)
5. \(\log 0{,}08 - \log0{,}8\\ = \log(0{,}08 : 0{,}8 ) \\ = \log ( 0{,}1) \\ =-1\)
6. \(\log 0{,}2 - \log2\\ = \log(0{,}2 : 2 ) \\ = \log ( 0{,}1) \\ =-1\)
7. \(\log 25 + \log0{,}004\\ = \log(25 \cdot 0{,}004 ) \\ = \log ( 0{,}1) \\ =-1\)
8. \(\log 5000 - \log50\\ = \log(5000 : 50 ) \\ = \log ( 100) \\ =2\)
9. \(\log 0{,}5 - \log50\\ = \log(0{,}5 : 50 ) \\ = \log ( 0{,}01) \\ =-2\)
10. \(\log 80 + \log0{,}000125\\ = \log(80 \cdot 0{,}000125 ) \\ = \log ( 0{,}01) \\ =-2\)
11. \(\log 20 + \log5\\ = \log(20 \cdot 5 ) \\ = \log ( 100) \\ =2\)
12. \(\log 0{,}4 + \log250\\ = \log(0{,}4 \cdot 250 ) \\ = \log ( 100) \\ =2\)