Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 80 + \log0{,}00125\)
2. \(\log 100000 - \log10\)
3. \(\log 50 + \log0{,}02\)
4. \(\log 20 + \log0{,}005\)
5. \(\log 0{,}2 - \log2\)
6. \(\log 5000 - \log500\)
7. \(\log 200 - \log2\)
8. \(\log 20 + \log5\)
9. \(\log 0{,}4 + \log25000\)
10. \(\log 250 + \log0{,}04\)
11. \(\log 5 + \log2\)
12. \(\log 0{,}01 - \log1\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 80 + \log0{,}00125\\ = \log(80 \cdot 0{,}00125 ) \\ = \log ( 0{,}1) \\ =-1\)
2. \(\log 100000 - \log10\\ = \log(100000 : 10 ) \\ = \log ( 10000) \\ =4\)
3. \(\log 50 + \log0{,}02\\ = \log(50 \cdot 0{,}02 ) \\ = \log ( 1) \\ =0\)
4. \(\log 20 + \log0{,}005\\ = \log(20 \cdot 0{,}005 ) \\ = \log ( 0{,}1) \\ =-1\)
5. \(\log 0{,}2 - \log2\\ = \log(0{,}2 : 2 ) \\ = \log ( 0{,}1) \\ =-1\)
6. \(\log 5000 - \log500\\ = \log(5000 : 500 ) \\ = \log ( 10) \\ =1\)
7. \(\log 200 - \log2\\ = \log(200 : 2 ) \\ = \log ( 100) \\ =2\)
8. \(\log 20 + \log5\\ = \log(20 \cdot 5 ) \\ = \log ( 100) \\ =2\)
9. \(\log 0{,}4 + \log25000\\ = \log(0{,}4 \cdot 25000 ) \\ = \log ( 10000) \\ =4\)
10. \(\log 250 + \log0{,}04\\ = \log(250 \cdot 0{,}04 ) \\ = \log ( 10) \\ =1\)
11. \(\log 5 + \log2\\ = \log(5 \cdot 2 ) \\ = \log ( 10) \\ =1\)
12. \(\log 0{,}01 - \log1\\ = \log(0{,}01 : 1 ) \\ = \log ( 0{,}01) \\ =-2\)