One (14) …………advance in mathematics is the building of great electronic computers, or calculating machines.. In a few seconds a computer can (15)…...problems that might take a m[r]
Trang 1WELCOME
TO OUR CLASS
Trang 2Oval; pentagon; rectangle; circle; octagon; spiral; square; pyramid; cube; triangle; sphere
Trang 3GUESS YOUR FRIENDS’ IDEAS
• counting
• multiplying
• adding
• dividing
• subtracting
• Geometry
• trigonometry
• triangle
• angle
• circle
• Sphere
• Diameter
• radius
Trang 4Unit 4 MATHEMETICS (CONT’T) Comprehension3: Toward Interpretation
• a Why do schools teach mathematics?
• b Why is algebra a sort of shorthand?
• c What is the recent advance in mathematics
mentioned in the passage ?
• d What can a computer do ?
They teach it because it plays such an important part
in our lives.
It is a short of shorthand because it can state many mathematical ideas with just a few letters and signs For example, …
It is the building of great electronic computers
A computer can, in a few seconds, solve problems that might take a man years to solve alone.
Trang 5Work in groups of four to discuss
these two questions
e What branches of mathematics have you
studied?
………
………
f What branches of mathematics do you like the most? Why ?
Ex: Among many ………., I like ………… ……… because……… ………
I have studied arithmetic, geometry, algebra, trigonometry and calculus.
Trang 6School boys and girls study mathematics Counting, adding, subtracting multiplying, and dividing are part of what they learn
important part in our lives How could we do such things (3)
…….figure time, make change, build houses, or even keep score for a game without knowing about numbers? Simple(4) ………… with numbers, or arithmetic, is one branch of mathematics Among the many(5)…………branches are geometry, algebra, trigonometry,
such things as angles, triangles, circles, and spheres Algebra is a sort of mathematical (8)…… ……… By using algebra we can state
we want to say, for example, that in any circle the (10)………… is
twice the radius we can write: d = 2r Gradually other branches of
mathematics (11) ……… added Mathematics today is of great use
more than a tool It is a way of thinking - of drawing conclusions (13)………….facts One (14) …………advance in mathematics is the building of great electronic computers, or calculating machines In a few seconds a computer can (15)… problems that might take
a man years to solve alone
as
calculation other
as do
shorthand
a few
diameter have been
many
solve
Trang 7Home work: Fill in the blanks with the words from the
list Make any changes if necessary:
Mathematics is one of the most (1)……… subjects in school In elementary schools, pupils learn(2)……… adding, subtracting
multiplying and dividing These (3)…… calculations are called
arithmetic Then in(4)……… school they will learn other branches of
mathematics such as……… (5)algebra, trigonometry.
Mathematics (6)…… used in almost every field of activities (7)…… lives It has become(8)……… useful to many other sciences However
it is much more than a tool It's a way of thinking drawing sound
conclusions from facts.
*** From the above passage, make questions with the words given and then
answer them:
1 What / pupils / elementary schools?
2 What / a way / thinking?
3 What/great use / many other sciences?
4 How/ important! mathematics?
5 What branches/ mathematics you like most?
geometry; count; day; great; simple; is; importance; high