Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 25 - \log25\)
2. \(\log 1000 - \log1\)
3. \(\log 40 + \log2,5\)
4. \(\log 250 + \log0,04\)
5. \(\log 250 + \log40\)
6. \(\log 25 + \log0,004\)
7. \(\log 0,2 + \log0,05\)
8. \(\log 5 + \log0,02\)
9. \(\log 0,8 + \log1250\)
10. \(\log 50000 - \log50\)
11. \(\log 0,5 - \log5\)
12. \(\log 20 + \log0,005\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 25 - \log25\\ = \log(25 : 25 ) \\ = \log ( 1) \\ =0\)
2. \(\log 1000 - \log1\\ = \log(1000 : 1 ) \\ = \log ( 1000) \\ =3\)
3. \(\log 40 + \log2,5\\ = \log(40 \cdot 2,5 ) \\ = \log ( 100) \\ =2\)
4. \(\log 250 + \log0,04\\ = \log(250 \cdot 0,04 ) \\ = \log ( 10) \\ =1\)
5. \(\log 250 + \log40\\ = \log(250 \cdot 40 ) \\ = \log ( 10000) \\ =4\)
6. \(\log 25 + \log0,004\\ = \log(25 \cdot 0,004 ) \\ = \log ( 0,1) \\ =-1\)
7. \(\log 0,2 + \log0,05\\ = \log(0,2 \cdot 0,05 ) \\ = \log ( 0,01) \\ =-2\)
8. \(\log 5 + \log0,02\\ = \log(5 \cdot 0,02 ) \\ = \log ( 0,1) \\ =-1\)
9. \(\log 0,8 + \log1250\\ = \log(0,8 \cdot 1250 ) \\ = \log ( 1000) \\ =3\)
10. \(\log 50000 - \log50\\ = \log(50000 : 50 ) \\ = \log ( 1000) \\ =3\)
11. \(\log 0,5 - \log5\\ = \log(0,5 : 5 ) \\ = \log ( 0,1) \\ =-1\)
12. \(\log 20 + \log0,005\\ = \log(20 \cdot 0,005 ) \\ = \log ( 0,1) \\ =-1\)