1.

$\log 6\approx 1,791759\dots$  

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$\log 89\approx 4,488637\dots$  

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$\log 0,2\approx -1,60944\dots$  

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$\log 1500\approx 7,313220\dots$  

 

2.

$\ln 1,2\approx 0,182322\dots$  

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$\ln 0,5\approx -0,693147\dots$  

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$\ln 45\approx 3,806662\dots$  

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$\ln 455\approx 6,120297\dots$