文档介绍：3 代數初步 練習3A 1. a + 5 = 10 a = _______ 2. b – 7 = 4 b = _______ 3. 3 – k = 5 k = _______ 4. 5q = 25 q = _______ 5. p = _______ 6. e = _______ 7. x – 10 = 4 x = _______ 8. 9 – s = 6 s = _______ 9. y = _______ 10. i + 55 = 4 i = _______ 11. c = _______ 12. 9 – z = 10 z = _______ 13. t + 10 = 18 t = _______ 14. d = _______ 15. 100 + f = 19 f = _______ 16. 89 – g = 90 g = _______ 練習3B 用最簡潔的方式表示下列數式。(題1 – 9) 1. q ´ r ____________ 2. a ´ b ´ 4 ____________ 3. 4 ÷ i ____________ 4. x ´ y ´ 3 ÷ z ____________ 5. p ÷ q ÷ r ´ 6 ____________ 6. 1 ÷ m ´ n ____________ 7. (4 ´ c) ÷ (7 ´ d) ____________ 8. (5 ÷ a) ´ (b ÷ 9) ____________ 9. 6 ´ x ´ y ´ z ÷ (a ´ b ´ c) ___________ 練習3E 練習3C 化簡下列數式。(題10 – 18) 10. a + a + a + a ___________________ 11. –d – d – d ___________________ 12. c ´ c ´ c ´ c ___________________ 13. 1 ÷ n ÷ n ÷ n ÷ n ÷ n__________________ 14. 3 + e + e + e ___________________ 15. ___________________ 16. f ÷ f ÷ f ÷ f ___________________ 17. (h + h + h) ÷ h ___________________ 18. 3 ´ k ´ k ___________________ 練習3D 以代數式表示下列各題。(題1 – 20) 1. 4加上n ___________________ 2. 從5a減去3 ___________________ 3. t與3u的積___________________ 4. b除以2的商___________________ 5. 6a與9的和___________________ 6. 5x與3y的積___________________ 7. 從9m減去5n的差___________________ 8. 5q除以6r ___________________ 9. 55b加上4c ___________________ 10. 3乘以e _______________