Triangles by folding paper

1. Take the piece of paper in your hands and fold it along an imaginary line.(Any line is OK).
2. Cross the previous line by folding the paper following another imaginary line.
3. Fold the paper along a third line, to make a triangle.
4. Unfold the paper and try to make the lines very clear and sharp.
5. Tear the paper carefully, along the lines you have made.
6. Now we have a triangle!
7. Hold the triangle in your hands and try to find the middle point of one side by joining the vertices of that side.
8. Fold the paper along the line that joins the middle point to the opposite vertex. That is the median of one side.
9. Repeat the last two steps to make the other two medians of the triangle.
10. The point where the lines cross is called the centroid or barycenter.

Word Problems

This is a collection of word problems related to fractions. Take your time reading them and looking at the pictures, try to solve them by using fractions and their operations.

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

Welcome

Welcome to my students of 1st of ESO

This blog is designed to help you with Mathematics in English.

Use it and ask the questions you want.

My thanks to Fina Cano for her materials.