Although it may seem paradoxical, the calculator can help a lot in the calculation in general and especially in mental arithmetic. We found different activities in the dossier MªAntònia channels. Numerical Trivia: The keyboard of the calculator has the numbers 1 through 9 located in a special position around the 5 0's is below, to the left. We found that: if we add two numbers in symmetric position with respect renta to 5, the result is always 10 if we add three numbers located on a straight line that passes through renta 5 get 15 if we add the five numbers we obtain the central renta cross 25 Marcel discovering mathematical curiosities mental arithmetic operations make it the opposite way, the machine does not automatically and can only be solved by mental arithmetic. Example: the number 14 is called, and should be sought or the amount remaining to give the result we also used 14 years (below). renta They result and keys that can be used. Only tell you the final result and the premise that you can not use the key or the key 1 0 These exercises calculator tool makes self correcting.
SEA Catalonia We are a family who live in Lower Llobregat, near Barcelona. This blog is a small window to share the experience of educating our children, Marcel (2005) and Rita (2008), outside the formal school. So Welcome! View my complete profile
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