cálculo mental 4° grado | Baamboozle - Baamboozle | The Most Fun Classroom Games!

cálculo mental 4° grado

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3X8 + 10 -4 doble- 1 decena

50

4x2 + 20 -10 +2 doble

40

2 x 10 - 1 decena + 3x5 doble

50

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