Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 200 + \log5\)
2. \(\log 10 - \log10\)
3. \(\log 40 + \log0{,}25\)
4. \(\log 8 - \log8\)
5. \(\log 5 + \log2\)
6. \(\log 0{,}05 - \log5\)
7. \(\log 50 - \log5\)
8. \(\log 0{,}8 - \log8\)
9. \(\log 20000 - \log2\)
10. \(\log 2500 - \log250\)
11. \(\log 20 - \log0{,}2\)
12. \(\log 0{,}2 + \log50000\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 200 + \log5\\ = \log(200 \cdot 5 ) \\ = \log ( 1000) \\ =3\)
2. \(\log 10 - \log10\\ = \log(10 : 10 ) \\ = \log ( 1) \\ =0\)
3. \(\log 40 + \log0{,}25\\ = \log(40 \cdot 0{,}25 ) \\ = \log ( 10) \\ =1\)
4. \(\log 8 - \log8\\ = \log(8 : 8 ) \\ = \log ( 1) \\ =0\)
5. \(\log 5 + \log2\\ = \log(5 \cdot 2 ) \\ = \log ( 10) \\ =1\)
6. \(\log 0{,}05 - \log5\\ = \log(0{,}05 : 5 ) \\ = \log ( 0{,}01) \\ =-2\)
7. \(\log 50 - \log5\\ = \log(50 : 5 ) \\ = \log ( 10) \\ =1\)
8. \(\log 0{,}8 - \log8\\ = \log(0{,}8 : 8 ) \\ = \log ( 0{,}1) \\ =-1\)
9. \(\log 20000 - \log2\\ = \log(20000 : 2 ) \\ = \log ( 10000) \\ =4\)
10. \(\log 2500 - \log250\\ = \log(2500 : 250 ) \\ = \log ( 10) \\ =1\)
11. \(\log 20 - \log0{,}2\\ = \log(20 : 0{,}2 ) \\ = \log ( 100) \\ =2\)
12. \(\log 0{,}2 + \log50000\\ = \log(0{,}2 \cdot 50000 ) \\ = \log ( 10000) \\ =4\)