1. 口算:
5H=___D 12D=___H 0FH=___D=___B
0CH=___D=___B 0AH=___D=___B 8D=___H=___B
0BH=___D=___B 0EH=___D=___B 10H=___D=___B
2. 口算:
10010B=___H 15H=___B 8FH=___B 200H=___B 111111111B=___H SwA47Gg2b917zd+jXn8fzwr3zm73G+L1dC6pGoGW0WU9pMY735+C1v7+gP4kjVXQ