4 ms·10+10+10 = 30 = 25+5 = 25 + 2 + (1+1+1) 9+9+9 = 25+2by badhabit 5y ago10+10+10 = 30 = 25+5 = 25 + 2 + (1+1+1) 9+9+9 = 25+2