Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 0,8 + \log0,125\)
2. \(\log 80 + \log0,00125\)
3. \(\log 50 - \log50\)
4. \(\log 40 + \log0,025\)
5. \(\log 20 - \log2\)
6. \(\log 250 - \log2,5\)
7. \(\log 50 + \log2\)
8. \(\log 250 + \log0,04\)
9. \(\log 8000 - \log0,8\)
10. \(\log 200 + \log5,0E-5\)
11. \(\log 0,2 - \log0,2\)
12. \(\log 0,002 - \log0,2\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 0,8 + \log0,125\\ = \log(0,8 \cdot 0,125 ) \\ = \log ( 0,1) \\ =-1\)
2. \(\log 80 + \log0,00125\\ = \log(80 \cdot 0,00125 ) \\ = \log ( 0,1) \\ =-1\)
3. \(\log 50 - \log50\\ = \log(50 : 50 ) \\ = \log ( 1) \\ =0\)
4. \(\log 40 + \log0,025\\ = \log(40 \cdot 0,025 ) \\ = \log ( 1) \\ =0\)
5. \(\log 20 - \log2\\ = \log(20 : 2 ) \\ = \log ( 10) \\ =1\)
6. \(\log 250 - \log2,5\\ = \log(250 : 2,5 ) \\ = \log ( 100) \\ =2\)
7. \(\log 50 + \log2\\ = \log(50 \cdot 2 ) \\ = \log ( 100) \\ =2\)
8. \(\log 250 + \log0,04\\ = \log(250 \cdot 0,04 ) \\ = \log ( 10) \\ =1\)
9. \(\log 8000 - \log0,8\\ = \log(8000 : 0,8 ) \\ = \log ( 10000) \\ =4\)
10. \(\log 200 + \log5,0E-5\\ = \log(200 \cdot 5,0E-5 ) \\ = \log ( 0,01) \\ =-2\)
11. \(\log 0,2 - \log0,2\\ = \log(0,2 : 0,2 ) \\ = \log ( 1) \\ =0\)
12. \(\log 0,002 - \log0,2\\ = \log(0,002 : 0,2 ) \\ = \log ( 0,01) \\ =-2\)