2 TH/vwo Ch2 Refresh

• Wiskunde
• Middelbare school
• havo, vwo
• Leerjaar 2

A new Chapter

Each paragraph starts with your learning goal for that paragraph and three learning paths you can follow to achieve that goal:

Support, Standard and Challenge

For each paragraph you can decide which learning path you are going to follow, write this down in your notebook after the paragraph number. At the end of the chapter we will discuss which paths you choose.

Reminder: how to work in your notebook

- Draw a margin line, exercise numbers/letters go in front of the margin line.

- Write with a blue or black pen, draw with a pencil and geo triangle.

- Write down steps/calculations, not only the answer.

- Correct exercises with a red pen. Indicate if your answer is correct and add the correct answer/steps if your answer is incorrect or incomplete.

- If you do not understand why your answer was wrong, or if you have a question, indicate this in the margin line, so you will remember to ask me the next lesson.

Any questions so far?

CH2 Statistics          contains this:

- Work with percentages

- Draw different graphs, diagrams and tables

- Calculate descriptive statistics

Recap: drawing angles

In §2.2 you will learn all about

pie charts. To draw a pie chart.

 For this you need to be able 

to draw angles!

In the next slide we will watch

a video about drawing angles

from year 1.    Good Refresh!

Calculations with a ratio table

In a ratio table you can divide or multiply the values in the top and bottom row by the same number.

Example: 100 grams of chocolates cost  €2.50. How much do you pay for 12 grams?

How to work our way from 100 grams to 12 grams?   

A good method is the ratio table!

What is the dutch expression for 'ratio table'? ANS

ratio table = ........ (dutch)

Calculations with a ratio table

In a ratio table you can divide or multiply the values in the top and bottom row by the same number.

Example: 100 grams of chocolates cost  €2.50. How much do you pay for 12 grams?

Key in your answer in the next slide!   

100 grams cost 2.50
12 grams cost ......

Calculations with a ratio table

In a ratio table you can divide or multiply the values in the top and bottom row by the same number.

Example: 100 grams of chocolates cost  €2.50. How much do you pay for 12 grams?

This picture is 

taken from 

exercise R5, p.43

However it contains

a MISTAKE:

In West Kirby not

13 but 14 people 

get on the bus!

Please correct this in your 

book.

What does 'average' mean?

ANS

average means ... in dutch

Homework - followed by working on Ch1 

- Make exercises R1-R6 from §2.Refresh (page 42-43)

- Correct your answers

- Remember the notebook rules!

- FINISHED doing the Homework?

   Work on on Ch1 Linear formulas:  any unfinished business? Finish it now!

   Or do the Test yourself on p.36/37.