In this page, you will find animations and graphic explanations for the schoolchildren, small drawing sometimes costing more than long speech

Hey , draw me maths....

Summing fractions

Many pupils miss understand the common denominator in the addition (or subtraction) of fraction.

I conceived this small graphic demonstration to defuse him with some pencil strokes.

Summing 1/2 and 2 /3

For the identical rendrent (in the same denominator) I cut the first one  by the number of strips of the second

The first by 3 and the second in 2

We count now 6 identical rectangles in every square: THE COMMON DENOMINATOR, the Divisor

We consider now numbers of squares yellow total:

3 in the first one, 4 in the second is a total of 7

Total is 7/6

(1*3)/(2*3) + (2*2)/(3*2)

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Pythagore

Animated Remarquables identities

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