lg2=0.31010,lg20=( )

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lg2=0.31010,lg20=()lg2=0.31010,lg20=()lg2=0.31010,lg20=()lg20=lg10+lg2=1+0.31010=1.31010

lg2=0.31010,lg20=( )
lg2=0.31010,lg20=( )

lg2=0.31010,lg20=( )
lg20=lg10+lg2=1+0.31010=1.31010