Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 0{,}01 - \log1\)
2. \(\log 2000 - \log2\)
3. \(\log 0{,}4 + \log25\)
4. \(\log 50000 - \log50\)
5. \(\log 50 + \log2\)
6. \(\log 4 + \log2{,}5\)
7. \(\log 0{,}4 - \log4\)
8. \(\log 1 + \log0{,}01\)
9. \(\log 20 - \log0{,}2\)
10. \(\log 25 - \log25\)
11. \(\log 1 + \log10\)
12. \(\log 80 - \log0{,}8\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 0{,}01 - \log1\\ = \log(0{,}01 : 1 ) \\ = \log ( 0{,}01) \\ =-2\)
2. \(\log 2000 - \log2\\ = \log(2000 : 2 ) \\ = \log ( 1000) \\ =3\)
3. \(\log 0{,}4 + \log25\\ = \log(0{,}4 \cdot 25 ) \\ = \log ( 10) \\ =1\)
4. \(\log 50000 - \log50\\ = \log(50000 : 50 ) \\ = \log ( 1000) \\ =3\)
5. \(\log 50 + \log2\\ = \log(50 \cdot 2 ) \\ = \log ( 100) \\ =2\)
6. \(\log 4 + \log2{,}5\\ = \log(4 \cdot 2{,}5 ) \\ = \log ( 10) \\ =1\)
7. \(\log 0{,}4 - \log4\\ = \log(0{,}4 : 4 ) \\ = \log ( 0{,}1) \\ =-1\)
8. \(\log 1 + \log0{,}01\\ = \log(1 \cdot 0{,}01 ) \\ = \log ( 0{,}01) \\ =-2\)
9. \(\log 20 - \log0{,}2\\ = \log(20 : 0{,}2 ) \\ = \log ( 100) \\ =2\)
10. \(\log 25 - \log25\\ = \log(25 : 25 ) \\ = \log ( 1) \\ =0\)
11. \(\log 1 + \log10\\ = \log(1 \cdot 10 ) \\ = \log ( 10) \\ =1\)
12. \(\log 80 - \log0{,}8\\ = \log(80 : 0{,}8 ) \\ = \log ( 100) \\ =2\)