 UNIT 6. PROPORTIONALITY

1.- PERCENTAGES

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

Exercise 1

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.

Test 1: Very easy

Test 2: A bit harder

Test 3: Only for confident

Test 4: Another test

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

Test 1: Very easy

Test 2: A bit harder

Test 3: Only for confident

6.- Now try these exercises

Exercise 1

4.- Exercises solution

1. 2. 