Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 8 + \log0{,}00125\)
2. \(\log 5 + \log2\)
3. \(\log 10 + \log0{,}001\)
4. \(\log 500 + \log0{,}2\)
5. \(\log 2{,}5 + \log40\)
6. \(\log 20000 - \log20\)
7. \(\log 250 + \log0{,}04\)
8. \(\log 0{,}5 - \log5\)
9. \(\log 0{,}08 - \log0{,}8\)
10. \(\log 5 + \log0{,}02\)
11. \(\log 0{,}004 - \log0{,}4\)
12. \(\log 250 + \log4{,}0E-5\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 8 + \log0{,}00125\\ = \log(8 \cdot 0{,}00125 ) \\ = \log ( 0{,}01) \\ =-2\)
2. \(\log 5 + \log2\\ = \log(5 \cdot 2 ) \\ = \log ( 10) \\ =1\)
3. \(\log 10 + \log0{,}001\\ = \log(10 \cdot 0{,}001 ) \\ = \log ( 0{,}01) \\ =-2\)
4. \(\log 500 + \log0{,}2\\ = \log(500 \cdot 0{,}2 ) \\ = \log ( 100) \\ =2\)
5. \(\log 2{,}5 + \log40\\ = \log(2{,}5 \cdot 40 ) \\ = \log ( 100) \\ =2\)
6. \(\log 20000 - \log20\\ = \log(20000 : 20 ) \\ = \log ( 1000) \\ =3\)
7. \(\log 250 + \log0{,}04\\ = \log(250 \cdot 0{,}04 ) \\ = \log ( 10) \\ =1\)
8. \(\log 0{,}5 - \log5\\ = \log(0{,}5 : 5 ) \\ = \log ( 0{,}1) \\ =-1\)
9. \(\log 0{,}08 - \log0{,}8\\ = \log(0{,}08 : 0{,}8 ) \\ = \log ( 0{,}1) \\ =-1\)
10. \(\log 5 + \log0{,}02\\ = \log(5 \cdot 0{,}02 ) \\ = \log ( 0{,}1) \\ =-1\)
11. \(\log 0{,}004 - \log0{,}4\\ = \log(0{,}004 : 0{,}4 ) \\ = \log ( 0{,}01) \\ =-2\)
12. \(\log 250 + \log4{,}0E-5\\ = \log(250 \cdot 4{,}0E-5 ) \\ = \log ( 0{,}01) \\ =-2\)