Arithmetics

• History of Numbering Systems 2:33
• Order of Numbers: previous and Next 5:36
• The double and half of a number 3:41
• Time: the hour 5:00
• Properties of Natural Numbers 5:15
• Strategies for Subtraction 2:47
• Multiples and Dividers 5:00
• Multiplying by two digits 5:00
• Multiplication strategies 5:00
• Multiplications with Rectangular Arrays 5:00
• Problems with multiplication 5:00
• Division 2:48
• Problems with Division 2:15
• Decimal Numbers 2:30
• Proportionality 2:30
• Proportion 2:30
• Multiplying and Dividing Fractions 3:43

Mathematical Analysis

• Longitud 2:30
• Measuring weight ans Capacity 2:30

Geometry

• Learn to measure 5:00
• Movements in the plane 2:30
• Characteristics of Geometric Figures 5:00
• Learning how to measure 4:18
• Circle and circumference 6:53
• Triangles and quadrilaterals 5:00
• Classification of triangles and quadrilaterals 5:00
• Characteristics of geometric bodies 5:00
• Triangles, squares, circles, rectangles 5:00
• Pythagoras Theorem 5:00
• Perimeters and areas 5:00
• The flat figures 5:00
• Relationships between angles 5:02
• Trigonometric reasons 4:43
• Angles between parallels 2:30

Operations with whole numbers

• Problemas con multiplicaciones y divisiones 2:30
• La división a través de restas sucesivas 2:30
• La divisibilidad 2:30
• División de números decimales 3:51

Whole Numbers

• Z: Whole Numbers 3:40
• Addition and subtraction of whole numbers 5:00

Decimal Numbers

• Operations with Decimal numbers 5:00
• Decimal system 5:00

Rational Numbers

• Addition and subtraction of rational numbers 2:30
• Multiplication and division of rational numbers 2:30

Proportions and Relations

• Proportion 5:00
• Relations and functions 5:00
• Thales' theorem: similarity and proportionality 2:30

Equations

• Additive and multiplicative equations 4:38