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!)