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$1$ $\dfrac {1} {5}\left(1+\dfrac {3} {5}-\dfrac {9} {10}\right)+\left(2+5\left(\dfrac {2} {8}-3\right)\right)$ $2.$ $-\dfrac {2} {5}\left(\dfrac {15} {20}-\dfrac {8} {10}\right)-\left(\dfrac {9} {2}+5\left(\dfrac {2} {8}-\dfrac {2} {4}\right)\right)$ $3$ $\dfrac {5} {4}\left(\dfrac {5} {2}-\dfrac {7} {10}\right)+\left(\dfrac {1} {2}+2\left(\dfrac {1} {8}-\dfrac {1} {4}\right)\right)$
Secundaria
Aritmética y álgebra
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Solución
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Profesor de Qanda - Jerson
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