Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 1000 - \log100\)
2. \(\log 40 + \log0{,}0025\)
3. \(\log 250 - \log250\)
4. \(\log 0{,}2 - \log2\)
5. \(\log 0{,}2 + \log0{,}5\)
6. \(\log 5 + \log2\)
7. \(\log 0{,}8 + \log125\)
8. \(\log 0{,}4 - \log4\)
9. \(\log 50 - \log50\)
10. \(\log 100 + \log0{,}0001\)
11. \(\log 500 + \log0{,}02\)
12. \(\log 8 + \log125\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 1000 - \log100\\ = \log(1000 : 100 ) \\ = \log ( 10) \\ =1\)
2. \(\log 40 + \log0{,}0025\\ = \log(40 \cdot 0{,}0025 ) \\ = \log ( 0{,}1) \\ =-1\)
3. \(\log 250 - \log250\\ = \log(250 : 250 ) \\ = \log ( 1) \\ =0\)
4. \(\log 0{,}2 - \log2\\ = \log(0{,}2 : 2 ) \\ = \log ( 0{,}1) \\ =-1\)
5. \(\log 0{,}2 + \log0{,}5\\ = \log(0{,}2 \cdot 0{,}5 ) \\ = \log ( 0{,}1) \\ =-1\)
6. \(\log 5 + \log2\\ = \log(5 \cdot 2 ) \\ = \log ( 10) \\ =1\)
7. \(\log 0{,}8 + \log125\\ = \log(0{,}8 \cdot 125 ) \\ = \log ( 100) \\ =2\)
8. \(\log 0{,}4 - \log4\\ = \log(0{,}4 : 4 ) \\ = \log ( 0{,}1) \\ =-1\)
9. \(\log 50 - \log50\\ = \log(50 : 50 ) \\ = \log ( 1) \\ =0\)
10. \(\log 100 + \log0{,}0001\\ = \log(100 \cdot 0{,}0001 ) \\ = \log ( 0{,}01) \\ =-2\)
11. \(\log 500 + \log0{,}02\\ = \log(500 \cdot 0{,}02 ) \\ = \log ( 10) \\ =1\)
12. \(\log 8 + \log125\\ = \log(8 \cdot 125 ) \\ = \log ( 1000) \\ =3\)