Integer numbers

One day the lowest temperature in this high mountain was -3 degrees and the highest, 12 degrees, what was the difference between them ?
Can you answer this question ? Integer numbers are the solution !

Rules of divisibility

Try to learn them by singing and enjoying!

Divisibility

Keywords and some exercises about divisibility

Powers and roots

You can revise the vocabulary about powers in this page
Do the exercise 1 in your notebook, please.

Rounding numbers

To round numbers to the nearest...

Place Value

In our decimal number system, the value of a digit depends on its place, or position, in the number. Each place has a value of 10 times the place to its right.

A number in standard form is separated into groups of three digits using commas. Each of these groups is called a period.

When a number is written in this form, it is said to be in "standard form."

Basic vocabulary of Numbers

Here you can find a very useful vocabulary about numbers.

Expressing numbers in English