Rekenregels (reeks 1)

Hoofdmenu Eentje per keer  🖨

Pas de rekenregels toe en bereken

1. \(\log 250 - \log250\)
2. \(\log 50 + \log0,2\)
3. \(\log 5 + \log0,02\)
4. \(\log 400000 - \log40\)
5. \(\log 0,2 - \log2\)
6. \(\log 8 + \log12,5\)
7. \(\log 0,8 + \log0,0125\)
8. \(\log 20 + \log500\)
9. \(\log 2,5 + \log0,4\)
10. \(\log 2 + \log0,05\)
11. \(\log 20 + \log0,5\)
12. \(\log 1 - \log100\)

---

Pas de rekenregels toe en bereken

Verbetersleutel

1. \(\log 250 - \log250\\ = \log(250 : 250 ) \\ = \log ( 1) \\ =0\)
2. \(\log 50 + \log0,2\\ = \log(50 \cdot 0,2 ) \\ = \log ( 10) \\ =1\)
3. \(\log 5 + \log0,02\\ = \log(5 \cdot 0,02 ) \\ = \log ( 0,1) \\ =-1\)
4. \(\log 400000 - \log40\\ = \log(400000 : 40 ) \\ = \log ( 10000) \\ =4\)
5. \(\log 0,2 - \log2\\ = \log(0,2 : 2 ) \\ = \log ( 0,1) \\ =-1\)
6. \(\log 8 + \log12,5\\ = \log(8 \cdot 12,5 ) \\ = \log ( 100) \\ =2\)
7. \(\log 0,8 + \log0,0125\\ = \log(0,8 \cdot 0,0125 ) \\ = \log ( 0,01) \\ =-2\)
8. \(\log 20 + \log500\\ = \log(20 \cdot 500 ) \\ = \log ( 10000) \\ =4\)
9. \(\log 2,5 + \log0,4\\ = \log(2,5 \cdot 0,4 ) \\ = \log ( 1) \\ =0\)
10. \(\log 2 + \log0,05\\ = \log(2 \cdot 0,05 ) \\ = \log ( 0,1) \\ =-1\)
11. \(\log 20 + \log0,5\\ = \log(20 \cdot 0,5 ) \\ = \log ( 10) \\ =1\)
12. \(\log 1 - \log100\\ = \log(1 : 100 ) \\ = \log ( 0,01) \\ =-2\)