Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 20 + \log0{,}05\)
2. \(\log 250 - \log250\)
3. \(\log 80 + \log12{,}5\)
4. \(\log 80000 - \log80\)
5. \(\log 100000 - \log10\)
6. \(\log 500 + \log0{,}002\)
7. \(\log 50 - \log50\)
8. \(\log 50 + \log0{,}02\)
9. \(\log 50 + \log20\)
10. \(\log 0{,}5 + \log2\)
11. \(\log 100 + \log0{,}01\)
12. \(\log 10 + \log0{,}001\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 20 + \log0{,}05\\ = \log(20 \cdot 0{,}05 ) \\ = \log ( 1) \\ =0\)
2. \(\log 250 - \log250\\ = \log(250 : 250 ) \\ = \log ( 1) \\ =0\)
3. \(\log 80 + \log12{,}5\\ = \log(80 \cdot 12{,}5 ) \\ = \log ( 1000) \\ =3\)
4. \(\log 80000 - \log80\\ = \log(80000 : 80 ) \\ = \log ( 1000) \\ =3\)
5. \(\log 100000 - \log10\\ = \log(100000 : 10 ) \\ = \log ( 10000) \\ =4\)
6. \(\log 500 + \log0{,}002\\ = \log(500 \cdot 0{,}002 ) \\ = \log ( 1) \\ =0\)
7. \(\log 50 - \log50\\ = \log(50 : 50 ) \\ = \log ( 1) \\ =0\)
8. \(\log 50 + \log0{,}02\\ = \log(50 \cdot 0{,}02 ) \\ = \log ( 1) \\ =0\)
9. \(\log 50 + \log20\\ = \log(50 \cdot 20 ) \\ = \log ( 1000) \\ =3\)
10. \(\log 0{,}5 + \log2\\ = \log(0{,}5 \cdot 2 ) \\ = \log ( 1) \\ =0\)
11. \(\log 100 + \log0{,}01\\ = \log(100 \cdot 0{,}01 ) \\ = \log ( 1) \\ =0\)
12. \(\log 10 + \log0{,}001\\ = \log(10 \cdot 0{,}001 ) \\ = \log ( 0{,}01) \\ =-2\)