WARMLY WELCOME
THE 23rd TEACHERS’ DAY NOVEMBER ,20th , 2004
LE TRUNG KIEN HIGH SCHOOL
Teacher : HUYØNH VUÕ CHÖÔNG
SCHOOL YEAR: 2004 – 2005
MATHEMATICS
In school boys and girls study mathematics, counting, adding, subtracting, multiplying, and dividing are a part of what they learn. Schools teach mathematics because it plays such an important part in our lives. How could we do such things as figure time, make change, build houses, or even keep score for a game without knowing about numbers ? Simple calculation with numbers, or arithmetic, is one branch of mathematics. Among the many other branches are geometry, algebra, trigonometry, and calculus. Mathematics has grown as the need for it has grown.

In school boys and girls study mathematics, counting, adding, subtracting, multiplying, and dividing are a part of what they learn. Schools teach mathematics because it plays such an important part in our lives. How could we do such things as figure time, make change, build houses, or even keep score for a game without knowing about numbers ?
counting
adding
subtracting
multiplying
dividing
figure time
keep score
numbers
To count (v.)
To add (v.)
To subtract (v.)
Counting (n.)
Adding (n.)
Subtracting (n.)
<----->
<----->
<---->
To multiply (v.)
To divide (v.)
To figure (v.)
Score (n.)
Number (n.)
Multiplying (n.)
Dividing (n.)
<----->
<----->
NEW WORDS
( ... + … )
( ... - … )
( ... x … )
( ... : … )
Manchester U. & Liverpool: 2 - 1
Complete the sentence: ( 20 is a --------------. )
----> To keep score
----> To figure time
Simple calculation with numbers, or arithmetic, is one branch of mathematics. Among the many other branches are geometry, algebra, trigonometry, and calculus. Mathematics has grown as the need for it has grown.
arithmetic
geometry
algebra
trigonometry
calculus
Arithmetic (n.)
4 + 4 – 2 = 6
Look at the box and tell us what branch of mathematics it is about.
B
C
A
A
Geometry (n.)
M
Look at the picture and tell us what branch of mathematics it is about.
Look at the box and tell us what branch of mathematics it is about.
3x + 5 = 11
Algebra (n.)
Sin2a = 2 cosa.sina
Look at the box and tell us what branch of mathematics it is about.
Trigonometry (n.)
15 + ( 34 – 17 ) = ?
Look at the box and tell us what branch of mathematics it is about.
Calculus (n.)
NEW WORDS :
- To count ( v. ) ----> counting ( n. )
- To add ( v. ) ----> adding ( n. )
- To subtract ( v. ) ----> subtracting ( n. )
- To multiply ( v. ) ----> multiplying ( n. )
- To divide ( v. ) ----> dividing ( n. )
To figure ( v. ) ----> To figure time
Score ( n.) -----> To keep score
Number ( n. )
Arithmetic ( n. ) - Trigonometry ( n. )
Geometry ( n. ) - Calculus ( n. )
- Algebra ( n. )
MATHEMATICS
In school boys and girls study mathematics, counting, adding, subtracting, multiplying, and dividing are a part of what they learn. Schools teach mathematics because it plays such an important part in our lives. How could we do such things as figure time, make change, build houses, or even keep score for a game without knowing about numbers ? Simple calculation with numbers, or arithmetic, is one branch of mathematics. Among the many other branches are geometry, algebra, trigonometry, and calculus. Mathematics has grown as the need for it has grown.

1. What do boys and girls study in school ?
2. Are counting, adding, subtracting, multiplying, and dividing a part of what they learn ?
---> Yes, they are.
3. Why do schools teach mathematics ?
---> Because it plays such an important part in our lives.
*> Questions : Answer the following questions
---> In school they study mathematics.
4. What branches of mathematics have you studied ?
---> We have studied arithmetic, geometry, algebra, trigonometry, and calculus.
5. Why has mathematics grown ?
---> Mathematics has grown because (as) the need for it has grown.
1. What kinds of calculations do pupils study at school ?
The kinds of calculations
Counting
Adding
Subtracting
Multiplying
Dividing
====>
CONSOLIDATION
2. What branches of mathematics are studied at school ?
Some branches of mathematics
====>
Arithmetic
Geometry
Algebra
Trigonometry
Calculus
Consolidation ( cont. )
Learn the new words by heart.
Answer the questions again.
Prepare the new lesson in advance. ( Text 2 – Paragraph 3,4,5,6 )
Find the meaning of the words : ( angle, triangle, circle, sphere, shorthand, diameter ).
Answer the question : ( What is one recent advance in mathematics ? )