Friday, April 29, 2011

Math meeting 4-29-2011

Dear all,

We have an awesome meeting today.
Children feel much more comfortable for the math we did today and they really did a very good job.
Since finial is coming, we will continue to review the school math until school end.

Here are the material we have done today

7th Grader-Regents Practice Tests: We have finished practice test 1
6th Grader-Pre-Algebra Final Exam

Further Study-
Problem solving strategy-Algebra practice test 1
1,Mean, median, mode :#6, #39
2,Venn Diagrams : #13
3,Pythagorean Theory: #33



Problem-Solving Strategies: Venn Diagram

Principle of Inclusion-Exclusion:Venn Diagram







More Study : Mathcounts note

Monday, April 25, 2011

“Average Speed “ v.s. “Average Number”

Average speed = total distance divided by total time= total distance / total time


1, chapter-coundown-19-2007(55)

Stan drove 300 miles in 5 hours, 20minutes.  Next, he drove 360 miles in 6 hours, 40 minutes.  What was Stan’s average speed in miles per hour for the total trip?

The average (arithmetic mean) is the sum of the values divided by the number of values.

Example : 5, 9, 10
Their sum is 5+9+10 = 24 and there are 3 numbers
The average is 24/3 = 8


1, school-sprint-20-2008(94)


Thomas took three 100-point quizzes, and the mean score for three quizzes was 87 points.  If the highest score is taken away, the mean of remaining two scores would be 83.5 points.  If the lowest score is taken away, the mean of the remaining two scores would be 89 points,  What is the highest score?

2, chapter-sprint -7-2007(1)
The mean of four distinct positive integers is 5,  If the largest integer is 13, what is the smallest integer?

Tuesday, April 19, 2011

math club is back-explore the world of Geometry

Hi, everybody

Spring comes, Spring goes,
Spring break is gone!
Time to resume,
Our math club is back!
Welcome to join our math club.

This time we are going to have fun with Geometry.
I am planning to use five meetings to explore the world of Geometry

Each meeting we will practice some problem solving strategies related to the 
subject.

Here is the outline for this five meetings

Meeting 1: Angle relationship-definitions, complementary and supplementary
angles

parallel line with transversal 

Meeting 2: Perimeter and Area: triangle, circle, square, rectangle, trapezoid, 
parallelogram.

Meeting3: Triangle: types of triangle, Pythagorean Theorem, special right 
triangle

Meeting4: Circle: area of circle, sector and segment, length of arc 

Meeting5: Regular polygons. Interior and exterior angles of a regular polygon. 
Diagonal for a Convex Polygon with N sides, problem solving strategy-two similar 
figure