1. Ronald Hui Tak Sun Secondary School
Mathematics
Ronald Hui
Tak Sun Secondary School

2. Mathematics Talk to me? Facebook: Ronald Hui IG: ronaldhuisir
Whatsapp:
Homepage for F1 students:
Ronald HUI

3. Mathematics What should be ready in the next lesson? Textbook
Erasable Pens/Pencils
Notebook & folder
Ronald HUI

4. Revision Arithmetic Operations (Chapter 0.2, page 0.2)
“+” – Addition Plus
“–” – Subtraction Minus
“x” – Multiplication Times
“” – Division Is divided by
Ronald HUI

5. Addition (加法) 1 + 2 1 + 2 = 3 1 plus 2 Add 2 to 1
1 plus 2 is equal to 3.
When we add 2 to 1, the answer is 3.
The sum (和) of 1 and 2 is 3.
Ronald HUI

6. Subtraction (減法) 4 – 3 4 – 3 = 1 4 minus 3 Subtract 3 from 4
4 minus 3 is equal to 1.
When we subtract 3 from 4, the answer is 1.
The difference (差) between 4 and 3 is 1.
Ronald HUI

7. Multiplication (乘法) 5 x 6 5 x 6 = 30 5 times 6 Multiply 5 by 6
5 times 6 is equal to 30.
When we multiply 5 by 6, the answer is 30.
The product (積) of 5 and 6 is 30.
Ronald HUI

8. Division (除法) 8  4 8 4 = 2 8 is divided by 4 / 8 over 4
Divide 8 by 4
8 4 = 2
8 over 4 is equal to 2.
When we divide 8 by 4, the quotient (商) is 2.
8 is dividend (被除數), 4 is divisor (除數), no remainder (餘數)
Ronald HUI

9. Commutative (互換) “+” and “x” are okay! “–” and “” are NOT okay!
1 + 2 = 2 + 1
5 x 6 = 6 x 5
“–” and “” are NOT okay!
4 – 3  3 – 4
8  4  4  8
Word order is important!
Subtract 3 from 4, 8 is divided by 4
Ronald HUI

10. Calculation order Please follow the order:
Brackets ( ), [ ], { } (小中大括號)
Multiplication / division first, then addition / subtraction (先乘除後加減)
From left to right (由左至右)
Ronald HUI

11. Numbers Numbers (Chapter 0.1, page 2) Natural Number (自然數)
1, 2, 3, 4, 5, …
Whole Number (完整數)
0, 1, 2, 3, 4, 5, …
Even Number (偶數，雙數)
0, 2, 4, 6, 8, …
Odd Number (奇數，單數)
1, 3, 5, 7, 9, …
Ronald HUI

12. Time for Practice Page 0.6 of Textbook 1A Page 0.7 of Textbook 1A
Class Practice
Page 0.7 of Textbook 1A
Exercise I Q1-10
Ronald HUI

13. Wikipedia 維基百科 https://en.wikipedia.org/wiki/Arithmetic
Ronald HUI

14. Mathematics nearby
How many times did the minute-hand (分針) overlap (重疊) with the hour-hand (時針) of a clock in a day?
12:00, 1:06, 2:11, 3:17, 4:22, 5:27, 6:33, 7:38, 8:43, 9:49, 10:54
22 times!
Ronald HUI

15. Mathematics nearby
In US Open (美國網球公開賽), 64 players are in the first round, how many matches will be played to find out the champion?
In English FA Cup (英國足總盃), 64 teams in the third round, how many matches will be played if there is no re-match (重賽)?
Ronald HUI

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