Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 100 - \log100\)
2. \(\log 20 + \log500\)
3. \(\log 50 - \log50\)
4. \(\log 80 + \log0{,}125\)
5. \(\log 200 - \log200\)
6. \(\log 5 + \log2000\)
7. \(\log 8000 - \log0{,}8\)
8. \(\log 2{,}5 + \log400\)
9. \(\log 4 + \log0{,}25\)
10. \(\log 250 + \log0{,}4\)
11. \(\log 2 + \log0{,}5\)
12. \(\log 0{,}02 - \log0{,}2\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 100 - \log100\\ = \log(100 : 100 ) \\ = \log ( 1) \\ =0\)
2. \(\log 20 + \log500\\ = \log(20 \cdot 500 ) \\ = \log ( 10000) \\ =4\)
3. \(\log 50 - \log50\\ = \log(50 : 50 ) \\ = \log ( 1) \\ =0\)
4. \(\log 80 + \log0{,}125\\ = \log(80 \cdot 0{,}125 ) \\ = \log ( 10) \\ =1\)
5. \(\log 200 - \log200\\ = \log(200 : 200 ) \\ = \log ( 1) \\ =0\)
6. \(\log 5 + \log2000\\ = \log(5 \cdot 2000 ) \\ = \log ( 10000) \\ =4\)
7. \(\log 8000 - \log0{,}8\\ = \log(8000 : 0{,}8 ) \\ = \log ( 10000) \\ =4\)
8. \(\log 2{,}5 + \log400\\ = \log(2{,}5 \cdot 400 ) \\ = \log ( 1000) \\ =3\)
9. \(\log 4 + \log0{,}25\\ = \log(4 \cdot 0{,}25 ) \\ = \log ( 1) \\ =0\)
10. \(\log 250 + \log0{,}4\\ = \log(250 \cdot 0{,}4 ) \\ = \log ( 100) \\ =2\)
11. \(\log 2 + \log0{,}5\\ = \log(2 \cdot 0{,}5 ) \\ = \log ( 1) \\ =0\)
12. \(\log 0{,}02 - \log0{,}2\\ = \log(0{,}02 : 0{,}2 ) \\ = \log ( 0{,}1) \\ =-1\)