PERCENTAGE. ARRANGEMENT BEFORE THE CHRISTMAS HOLIDAY This week: Percentage Next Week: Basic...
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Transcript of PERCENTAGE. ARRANGEMENT BEFORE THE CHRISTMAS HOLIDAY This week: Percentage Next Week: Basic...
PERCENTA
GE
ARRANGEMENT BEFORE THE CHRISTMAS HOLIDAYThis week:
Percentage
Next Week:
Basic knowledge of 2D and 3D shape and revision
The week before Christmas:
Revision (Monday) and Two Tests: All the topics you have learned (Fraction and Decimal, Problem solving, Investigating Pattern, Algebra, Equation, Percentage and Basic knowledge of 2D and 3D shape)….
Summative Assessment:
The topic of Summative Assessment is: Investigating Pattern and Algebra (Simple substitution)—Criteria A and C
Materials for revision: 1, Textbook and Math Journal 2, 5-level growing pattern worksheet 3, One of the test paper 4, Mathletics
DEFINITION OF PERCENTAGE
A number out of 100
QUESTIONS:
9 out of 100=?%
3.4 out of 100=?%
120 out of 100=?%
QUESTIONS
25/100 =?%
21/100=?%
42/100=?%
4.6/100=?%
25/100 =25%
21/100=21%
42/100=42%
4.6/100=4.6%
1/4= ? %
1X25
4X25
=25/100=25%
CONVERTING FRACTION TO PERCENTAGE
CONVERTING FRACTION TO PERCENTAGE
A, 1/20=?%B, 4/5=?%
A NUMBER OUT OF 100
1X5
20X5
=5/100 =5%
25/100 =25%
21/100=21%
42/100=42%
4.6/100=4.6%
25%=?
21%=?
42%=?
4.6%=?
PERCENTAGE TO FRACTION
25%=25/100=1/4
21%=21/100
4.6%=4.6/100=46/1000=23/500
Simplify /simplest form!
%---divided by 100
A NUMBER OUT OF 100
QUESTIONS:
Watch a clip and answer:
1, What is another way of changing fraction to percentage?
2, How to change decimal to percentage?
3, There is a mistake in the clip! Can you find out?
DECIMAL TO PERCENTAGE
http://www.youtube.com/watch?v=Kr52yfR3wGA
• How can we choose the different strategies in changing fraction to percentage?
Fraction---- Decimal-----Percentage
• How to change decimal to percentage?
X100%
0.23X100%=23
Moving the decimal point two places forward!
WHICH STRATEGY TO CHOOSE?
3/4
5/9
5/8
2/7…….
PRACTICE
0.73=?%
0.73=?%
0.073=?%
7.3=?%
0.73=?%
0.073=?%
0.0073=?%
7.3=?%
73%=?
7.3%=?
0.73%=?
730%=?
CHANGE PERCENTAGE TO DECIMAL
HOMEWORK
My Pals are here 6A (the Blue textbook)
Page 214 Question 1-7 and choose 2 from Question 8-12 to do (No calculator! It can only be used it to check your answers!)