| | (︽ | ︾ ) | 1. | = × | ( | 12 | ； 1 1 | ； 12 12 | ) | 2. | = | × | 3. | = | × + ( | 6 ； | | ) | 4. | = | × | 5. | = × | | 6. | | = | ×50% | | | ︽ | | ︾ | 1. = + + | | 2. = (／ ) | × ( ) ( | ； | | | ) | 3. = ( ／ )× | () ( | ) | 20 | | 4. | | | 5. = | | (／ )× | 6. | | 7. = | ( | )× | ×20 (60 | 1 ；7 5 5 | ) | 8. = | ×( ／ ) ( | ) | 9. = | ×6 | 10. = | | ( | )× | ( 1 )× ／ | ( 18 | ； | 20 ；60 | 1 ；75 | 5 ) | 11. = | | ( | ) × 20 ( 6 0 | 1 ；75 5 ) |