# Elementary School (page 3)

## Decimal numbers

Decimal numbering
Decimal fractions
Transformation of decimal numbers to decimal fractions and vice versa
Equivalent Decimals, Decimal Comparison

## Averages

Simple arithmetic mean
Weighted average

## Rational numbers

What is a rational number?
Set of rational numbers and their subsets
Operations with rational numbers

## Tables

Times table from 1 to 10
Table of Arabic, Cardinal and Ordinal Numbers

## Trigonometric reasons

Chicks and hypotenuse
Sine and Cosine
Tangent
The trigonometric ratios of 30º, 45º and 60º

## Polygon Similarity

Introduction
Similar Polygons
Polygon similarity properties

## Operations with decimal rational numbers

Multiplication
Exact division
Not exact division
Decimal representation of an ordinary fraction
Potentiation and square root

Definition, elements, concave and convex
Sum of inner angle measurements
Rectangle, Rhombus, Square and Trapezoid
Trapezoid rectangle, isosceles and scalene
Properties of parallelograms

## Angles

The angle and its elements
Null angle and shallow angle
Measurement of an angle
Using the protractor