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Sumant peres i pomes

Sumant peres i pomes

To calculate the value of pear and apple from 2 purchases.

About mental arithmetic, with a pre-algebra tool introducing ghe Gaussian elimination.

Version in Catalan: In catalan is necessary to change oranges for pears.

In Catalan the quote is: "No es poden sumar peres i pomes" (You can't add pears and apples)

Per a calcular el valor d'una pera i una poma a partir del preu de dos cistells de fruita....

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