2TTO §2.1 Ratio table PTI 24-25

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

Any questions about the homework?

CH2 Statistics contains this:

- Work with percentages - Ratio table

- Representing data by graphs, diagrams and tables

- Mean, mode and median - grouping data

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.

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?

Calculations with a ratio table

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

Use a ratio table!

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?

Homework

- §2.1 Ratio table: Do exercises 3, 5, C1 and C2 (page 50-51)

- Check your answers with the solutions book!