Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 40 + \log0{,}00025\)
2. \(\log 2 + \log0{,}5\)
3. \(\log 1000 - \log1\)
4. \(\log 25 + \log4\)
5. \(\log 50 + \log0{,}002\)
6. \(\log 500 + \log0{,}2\)
7. \(\log 200 - \log20\)
8. \(\log 20 + \log0{,}0005\)
9. \(\log 100 + \log0{,}01\)
10. \(\log 80 - \log8\)
11. \(\log 0{,}2 - \log2\)
12. \(\log 4000 - \log0{,}4\)

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Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 40 + \log0{,}00025\\ = \log(40 \cdot 0{,}00025 ) \\ = \log ( 0{,}01) \\ =-2\)
2. \(\log 2 + \log0{,}5\\ = \log(2 \cdot 0{,}5 ) \\ = \log ( 1) \\ =0\)
3. \(\log 1000 - \log1\\ = \log(1000 : 1 ) \\ = \log ( 1000) \\ =3\)
4. \(\log 25 + \log4\\ = \log(25 \cdot 4 ) \\ = \log ( 100) \\ =2\)
5. \(\log 50 + \log0{,}002\\ = \log(50 \cdot 0{,}002 ) \\ = \log ( 0{,}1) \\ =-1\)
6. \(\log 500 + \log0{,}2\\ = \log(500 \cdot 0{,}2 ) \\ = \log ( 100) \\ =2\)
7. \(\log 200 - \log20\\ = \log(200 : 20 ) \\ = \log ( 10) \\ =1\)
8. \(\log 20 + \log0{,}0005\\ = \log(20 \cdot 0{,}0005 ) \\ = \log ( 0{,}01) \\ =-2\)
9. \(\log 100 + \log0{,}01\\ = \log(100 \cdot 0{,}01 ) \\ = \log ( 1) \\ =0\)
10. \(\log 80 - \log8\\ = \log(80 : 8 ) \\ = \log ( 10) \\ =1\)
11. \(\log 0{,}2 - \log2\\ = \log(0{,}2 : 2 ) \\ = \log ( 0{,}1) \\ =-1\)
12. \(\log 4000 - \log0{,}4\\ = \log(4000 : 0{,}4 ) \\ = \log ( 10000) \\ =4\)