1. (11)2 = (   )10          
2. (0110)2 = (   )10          
3. (1010001)2 = (   )10          
4. (01010001)2 = (   )10          
5. (25)10 = (     )2 = ( )16    
6. (52)10 = (     )2 = ( )16    
7. (255)10 = (     )2 = ( )16    
8. (525)10 = (     )2 = ( )16    
9. (10)2 + (11)2 = (     )2 = ( )16 = ( )10
10. (101)2 + (1011)2 = (     )2 = ( )16 = ( )10
11. (10110)2+(1001)2 = (     )2 = ( )16 = ( )10
12. (1010)2 + (111)2 = (     )2 = ( )16 = ( )10