Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 200 - \log20\)
2. \(\log 4 + \log2500\)
3. \(\log 0{,}2 - \log20\)
4. \(\log 5 - \log50\)
5. \(\log 200 + \log0{,}5\)
6. \(\log 2500000 - \log250\)
7. \(\log 0{,}4 + \log0{,}025\)
8. \(\log 10 - \log100\)
9. \(\log 400 - \log40\)
10. \(\log 0{,}002 - \log0{,}2\)
11. \(\log 100 + \log100\)
12. \(\log 0{,}5 - \log5\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 200 - \log20\\ = \log(200 : 20 ) \\ = \log ( 10) \\ =1\)
2. \(\log 4 + \log2500\\ = \log(4 \cdot 2500 ) \\ = \log ( 10000) \\ =4\)
3. \(\log 0{,}2 - \log20\\ = \log(0{,}2 : 20 ) \\ = \log ( 0{,}01) \\ =-2\)
4. \(\log 5 - \log50\\ = \log(5 : 50 ) \\ = \log ( 0{,}1) \\ =-1\)
5. \(\log 200 + \log0{,}5\\ = \log(200 \cdot 0{,}5 ) \\ = \log ( 100) \\ =2\)
6. \(\log 2500000 - \log250\\ = \log(2500000 : 250 ) \\ = \log ( 10000) \\ =4\)
7. \(\log 0{,}4 + \log0{,}025\\ = \log(0{,}4 \cdot 0{,}025 ) \\ = \log ( 0{,}01) \\ =-2\)
8. \(\log 10 - \log100\\ = \log(10 : 100 ) \\ = \log ( 0{,}1) \\ =-1\)
9. \(\log 400 - \log40\\ = \log(400 : 40 ) \\ = \log ( 10) \\ =1\)
10. \(\log 0{,}002 - \log0{,}2\\ = \log(0{,}002 : 0{,}2 ) \\ = \log ( 0{,}01) \\ =-2\)
11. \(\log 100 + \log100\\ = \log(100 \cdot 100 ) \\ = \log ( 10000) \\ =4\)
12. \(\log 0{,}5 - \log5\\ = \log(0{,}5 : 5 ) \\ = \log ( 0{,}1) \\ =-1\)