## UNIT 6. PROPORTIONALITY

**1.- PERCENTAGES**

Do the following interactive exercises to know how to calculate percentages.

In your notebook answer the following questions:

What does the percentage means?

How do you calculate the percentage of an amount?

Calculate 30% of 1000 and 20% de 300.

Read the following sheets: Sheet 1, sheet 2 and watch this video

In the next website do the exercises “Cálculo mental” and “Test”

In the next website do the exercises “Tú mandas”, “Cuadrolos”, “%Coloreado” and “Test”

Do the following game

In your notebook answer the following questions:

How do you change a percentage in a fraction? Write an example

How do you change a percentage in a decimal number? Write an example

Do the following tests to check what you have learnt about percentages.

**2.- DISCOUNTS AND INCREMENTS**

Read the following sheet

In the following website do all the exercises

Copy an example of “Máquina transforma”, “Recargo”, “Descuento”

Play this shopping game

Learn how to buy with discounts

**3.- DIRECT PROPORTION **

1. Do the following interactive exercises to know more about direct ratio. Choose “Magnitudes directamente proporcionales” and then “Reducción a la unidad”

Copy in your notebook the definition of “Magnitudes directamente proporcionales”

2. Solve the following proportion by cross-multiplying.

Copy two examples into your notebook

3. Read the following text and copy the definition of direct proportion into your notebook

4. Try the next interactive activity to understand ratios

5. Do the following test to check what you have learnt about ratios and direct proportion

6.- Now try these exercises

THIS WEB IS VERY COMPLET AND EDUCATIVE!!!!i love the maths

by ROSINA February 24, 2009 at 11:41 am¿Lios con las razones y con los porcentajes?

by Marina March 10, 2009 at 7:17 pmAquí está la solución…