Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 50000 - \log50\)
2. \(\log 80 - \log8\)
3. \(\log 20 + \log50\)
4. \(\log 2000 - \log0{,}2\)
5. \(\log 25000 - \log2{,}5\)
6. \(\log 0{,}008 - \log0{,}8\)
7. \(\log 20 + \log0{,}005\)
8. \(\log 0{,}4 - \log4\)
9. \(\log 0{,}4 + \log2500\)
10. \(\log 2 + \log0{,}05\)
11. \(\log 10000 - \log10\)
12. \(\log 100 + \log100\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 50000 - \log50\\ = \log(50000 : 50 ) \\ = \log ( 1000) \\ =3\)
2. \(\log 80 - \log8\\ = \log(80 : 8 ) \\ = \log ( 10) \\ =1\)
3. \(\log 20 + \log50\\ = \log(20 \cdot 50 ) \\ = \log ( 1000) \\ =3\)
4. \(\log 2000 - \log0{,}2\\ = \log(2000 : 0{,}2 ) \\ = \log ( 10000) \\ =4\)
5. \(\log 25000 - \log2{,}5\\ = \log(25000 : 2{,}5 ) \\ = \log ( 10000) \\ =4\)
6. \(\log 0{,}008 - \log0{,}8\\ = \log(0{,}008 : 0{,}8 ) \\ = \log ( 0{,}01) \\ =-2\)
7. \(\log 20 + \log0{,}005\\ = \log(20 \cdot 0{,}005 ) \\ = \log ( 0{,}1) \\ =-1\)
8. \(\log 0{,}4 - \log4\\ = \log(0{,}4 : 4 ) \\ = \log ( 0{,}1) \\ =-1\)
9. \(\log 0{,}4 + \log2500\\ = \log(0{,}4 \cdot 2500 ) \\ = \log ( 1000) \\ =3\)
10. \(\log 2 + \log0{,}05\\ = \log(2 \cdot 0{,}05 ) \\ = \log ( 0{,}1) \\ =-1\)
11. \(\log 10000 - \log10\\ = \log(10000 : 10 ) \\ = \log ( 1000) \\ =3\)
12. \(\log 100 + \log100\\ = \log(100 \cdot 100 ) \\ = \log ( 10000) \\ =4\)