Here you have the Unit 1 in English. If you have any doubt related to the vocabulary, you can get the vocabulary sheet too.
You only have to click on the following links:
And here you have an example of exam questions
¿Does the natural numbers properties ring a bell?
Click on the link below and get them:
You can learn the order of operations by watching the Bedmas song:
If you click here you will find interactive games to improve operations with natural numbers and how to get the correct answer as fast as possible! It´s fun!!
Do you fancy playing with maths?
So, go on!
If you want to review the lesson, click below to download exercises with Natural numbers: