Across
- 4. to make something smaller
- 6. 共同
- 8. an ordered (有次序) pattern (模式) of numbers
- 9. why do the lights works? Computers, cell phones?
- 12. to make something simpler
- 13. the study of nature
- 14. what you get when you subtract two numbers
- 16. a member (分子）of a sequence
Down
- 1. a sequence where the difference between numbers is constant （不变）
- 2. 100 years
- 3. 连续
- 5. a sequence with a constant ratio （不变的比例）between terms
- 7. the verb for multiplication
- 10. a cold season
- 11. from big to small
- 15. to make something bigger