dissabte, 11 de desembre de 2010

dimarts, 7 de desembre de 2010

dimecres, 24 de novembre de 2010


Today you have a new challenge. You will check your knowledge about positive and negative exponents and you'll see how mathematics are related to science. This is a WebQuest about Scientific Notation

Answer by Hector Adrover

dimecres, 17 de novembre de 2010

Powers with negative exponent

We know the meaning of a power when the exponent is a counting number, now we are going to study what the meaning is if the exponent is a negative number.The base can be any rational number. Go to this page

dimecres, 3 de novembre de 2010

Revising operations with fractions

Using Descartes

Fractions and percentages

Apply your knowledge about fractions and percentages in order to solve this problem. Organize the data and let's go!

Real numbers

I'm sure that you remember the number theory that you studied last year, now we are going to revise the most important. Try to do this test and, if you make some mistakes, go to the explanation.

dimarts, 26 d’octubre de 2010

Finding Probabilities

Practise how to calculate probabilities when each outcome is equally likely.

But what is the probability that when you look out of a window at a street, the next car that passes will be red?

You need to use relative frequency

Finally, watch this video

dimecres, 13 d’octubre de 2010


Here, there are some execises about how to calculate the probability of chance events. Try to express the results as a fraction, as a decimal number and as a percentage too. Certain and Impossible Events

Sometimes, there is a small problem in listing all the outcomes of an experiment; practise it in this page Sample spaces

dimarts, 5 d’octubre de 2010

Two problems

1. The average weight of the 11 players in a football team was 72.5 kg. The average weight of the 5 reserve players was 75.6 kg. What was the average weight of the whole squad? ( Give your answer to 3 s.f.)

2. The mean daily weight of potatoes sold in a greengrocer's from Monday to Friday was 14 kg. The mean daily weight of potatoes sold from Monday to Saturday was 15 kg. How many kg of potatoes were sold on Saturday?

Careful with this, the mean is useful to work out the total weight.

diumenge, 26 de setembre de 2010


Well, we are going to study the subject Statistics. You have new words to learn and some problems to solve in this worksheet. Don't worry about them, they are easy, but try to be organized . It's very important.

Let's go!

dissabte, 25 de setembre de 2010


Well, here we are again ready to go on learning Maths in English.

I hope this blog will be useful and I would like to have your comments so that

it can be so helpful as possible.

Let's start by looking at the first post.

The first post goes to the the blog of 2ndESO Mathematics.