5th grade
Natural numbers
Basic arithmetic operations
Calculation laws and advantages
Geometry

6th grade
Divisibility of numbers
Factions
Decimal fractions
Angles and angle measures

7th grade
Assignment and rule of three
Calculation of percentage
Rational numbers
Equation and inequation
Probability calculus

8th grade
Function and assignment
Triangles
Quadrangles
Calculation of surfaces
Transformation of terms
Probability calculus

9th grade
The root
Record set of the pythagoras

10th grade
Circle calculation
The cone
Power calculation
Power laws
Exponential function
Logarithm
Trigonometry
Probability calculus

 

Four system

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Just like in the three system, the numbers are built on one, four and the power of four: 4 ones equal one four, 4 fours equal one sixteen, 4 sixteens equal one sixtyfour, … The numbers are characterized with a 4:

e. g.: 93

256

64

16

4

1

0

1

1

3

1

0 256   + 1 64   + 1 16  + 3 4     +  1 1

 

 

93 = 11314

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02/09/07