Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 40 + \log0{,}0025\)
2. \(\log 100000 - \log10\)
3. \(\log 5000 - \log50\)
4. \(\log 250 + \log40\)
5. \(\log 0{,}004 - \log0{,}4\)
6. \(\log 0{,}8 + \log1250\)
7. \(\log 2 + \log5000\)
8. \(\log 0{,}1 - \log1\)
9. \(\log 0{,}4 + \log2500\)
10. \(\log 50 + \log0{,}02\)
11. \(\log 20 + \log0{,}05\)
12. \(\log 80 + \log12{,}5\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 40 + \log0{,}0025\\ = \log(40 \cdot 0{,}0025 ) \\ = \log ( 0{,}1) \\ =-1\)
2. \(\log 100000 - \log10\\ = \log(100000 : 10 ) \\ = \log ( 10000) \\ =4\)
3. \(\log 5000 - \log50\\ = \log(5000 : 50 ) \\ = \log ( 100) \\ =2\)
4. \(\log 250 + \log40\\ = \log(250 \cdot 40 ) \\ = \log ( 10000) \\ =4\)
5. \(\log 0{,}004 - \log0{,}4\\ = \log(0{,}004 : 0{,}4 ) \\ = \log ( 0{,}01) \\ =-2\)
6. \(\log 0{,}8 + \log1250\\ = \log(0{,}8 \cdot 1250 ) \\ = \log ( 1000) \\ =3\)
7. \(\log 2 + \log5000\\ = \log(2 \cdot 5000 ) \\ = \log ( 10000) \\ =4\)
8. \(\log 0{,}1 - \log1\\ = \log(0{,}1 : 1 ) \\ = \log ( 0{,}1) \\ =-1\)
9. \(\log 0{,}4 + \log2500\\ = \log(0{,}4 \cdot 2500 ) \\ = \log ( 1000) \\ =3\)
10. \(\log 50 + \log0{,}02\\ = \log(50 \cdot 0{,}02 ) \\ = \log ( 1) \\ =0\)
11. \(\log 20 + \log0{,}05\\ = \log(20 \cdot 0{,}05 ) \\ = \log ( 1) \\ =0\)
12. \(\log 80 + \log12{,}5\\ = \log(80 \cdot 12{,}5 ) \\ = \log ( 1000) \\ =3\)