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Mathematics

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Nguồn: http://hcm.edu.vn
Người gửi: Trương Hoàng Anh (trang riêng)
Ngày gửi: 18h:16' 07-12-2007
Dung lượng: 2.0 MB
Số lượt tải: 29
Số lượt thích: 0 người
UNIT 4
MATHEMATICS
(Reading Comprehension)
A. PRE-READING
In school boys and girls study
counting
adding and subtracting
multiplying and dividing
all of them are correct

Schools teach mathematics because
all pupils like it
it is important in our lives
it is a way of thinking
it has grown rapidly
Among the branches of mathematics are arithmetic, geometry, algebra, calculus and
calculation
economics
computer science
trigonometry
One recent advance in mathematics is the building of
personal computers
calculating machines
both are correct
both are incorrect




Choose the most correct answer while listening
B. WHILE-READING
I. Find the words in the reading which have the meanings
Simple calculation with numbers
Mathematical ideas expressed in letters and signs
The study of form
System of rapid writing by using symbols, letters, and signs
Spaces between two lines or two surfaces that meet
Simple calculation with numbers



Mathematical ideas expressed in letters and signs
Arithmetic
Ex:
Algebra
Ex: Solve the equation
The study of form
Geometry
Ex: In the figure, angle C =50 degrees and AD = DC. How many degrees are there in angle y?
System of rapid writing by using symbols, letters, and signs


Spaces between two lines or two surfaces that meet
Shorthand





Angles
II. Match these shapes and their names.











Sphere
Triangle
Square
Cube
Circle
Rectangle

What’s this?
Sphere
Triangle
Square
Cube
Circle
Rectangle

It’s a square.
What’s this?





Sphere
Triangle
Square
Cube
Circle
Rectangle


It’s a rectangle.
What’s this?




Sphere
Triangle
Square
Cube
Circle
Rectangle


It’s a cube.
What’s this?




Sphere
Triangle
Square
Cube
Circle
Rectangle


It’s a triangle.
What’s this?





Sphere
Triangle
Square
Cube
Circle
Rectangle


It’s a circle.
diameter
radius
What’s this?





Sphere
Triangle
Square
Cube
Circle
Rectangle


It’s a sphere.
III. True or False sentences
Schools teach mathematics because it plays such an important role in our lives.
True
True
False
False
False
Trigonometry is a sort of mathematical shorthand.
Mathematics is a tool only.
Mathematics has developed as the need for it has developed.
It takes a man years to solve a problem by computer.
IV. Answer the questions
Why do schools teach mathematics?
Schools teach mathematics because it plays such an important part in our lives.

Can we build a house without knowing about numbers?
No, we can’t.
IV. Answer the questions
Why is algebra a sort of mathematical shorthand?
Because by using algebra we can state many mathematical ideas with just a few letters and signs.

What does “d = 2r” mean?
It means in any circle the diameter is twice the radius.
IV. Answer the questions
What can a computer do?
It can solve problems that might take a man years to solve alone in a few seconds.

What branches of mathematics have you studied?
We’ve learned arithmetic, geometry, algebra, and trigonometry.
C. POST-READING
GAME: Crossword Puzzle
Simple calculation with numbers.
An electronic computer is also called a calculating ___.
The words CIRCLE has 6 _______.
This secretary can write in _____.
Five plus five _______ ten.
Study of form.
Trigonometry is among the _______ of mathematics.
In algebra we can ______ many ideas by using a few letters and signs.
The straight line connecting the center of a circle to one point on it sides.
In any circle, the diameter is _______ the radius.
The Earth is a _______.
SONG Listen and fill in the blanks SHAPE SONG
1) I’m a shape now guess my name
I’m _______ and ________and very plain
So many things are shaped like me
Like a wheel on a truck and a cake for tea.
What is my name? I’m a _______.

Chorus
Different shapes make different things
Up and down and round round rings
Turn me up and turn me down.
Mix and match and make a crown.
2) I’m a shape, now guess my name
I have _______ sides all shaped the same.
So many things are shaped like me.
Like a box of chocolate just for me.
What is my name? I am a _______
3) I am a shape, now guess my name.
You go up one side then _______ again.
So many things are shaped like me.
Like a mountain high and a pyramid.
What is my name? I’m a _______.
4) I’m a shape, now guess my name.
I am very _______ but short at the ends.
So many things look just like me.
I am such a funny shape, don’t ______ me.
What is my name? I am a _______.
round
round
circle
four
square
down
triangle
wide
forget
rectangle
What are they learning?
English
It’s a chair
Which subject?
Chemistry
Which subject?
Physics
P = m x
Which subject?
Physical Education
Which subject?
Biology
Which subject?
Geography
CONSOLIDATION

Name some simple calculation pupils learn in school
Name some branches of mathematics
HOMEWORK
Do all the exercises in your hand-outs
The end
Thanks for your attention
 
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