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$ A="08"
$ B="01"
$ printf "%02d" $(($A + $B))bash: 08: value too great for base (error token is "08")
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$ printf "%02d" $((10#$A + 10#$B))09
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$ C=$(builtin printf "%02d" $((10#$A + 10#$B)))$ echo ”$C””09”
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