1. Using Algebra to Solve Problems
Form 1 Mathematics
Chapter 2 and Chapter 4

2. Like Terms and Unlike Terms
When we work on the followings, we should put together the like terms and then simplify!
For examples:
1. A +2B +3A +4B = A +3A +2B +4B
= 4A + 6B
2. A -2B –3A +4B = A -3A -2B +4B
= (A-3A) + (-2B+4B)
= (-2A) + (2B)
= -2A +2B
Ronald HUI

3. Equations Addition of equality (等量相加) X – 7 = 2 X -7 +7 = 2 +7 X = 9
Ronald HUI

4. Equations Subtraction of equality (等量相減) X + 7 = 12 X +7 - 7 = 12 -7
Ronald HUI

5. Equations Multiplication of equality (等量相乘) X  5 = 4 X 5  5 = 4  5
Ronald HUI

6. Equations Division of equality (等量相除) 5X = 20 5X  5 = 20  5 X = 4
Ronald HUI

7. Time for Practice Page 91 of Textbook 1A Page 92 of Textbook 1A
Class Practice
Page 92 of Textbook 1A
Questions 15, 17, 19, 21, 23, 25

8. Good Luck! Enjoy the world of Mathematics!
Ronald HUI