\(\dfrac{15,6\cdot260-156\cdot26}{15,6\cdot3,3\cdot3,4\cdot2,6}\)
\(=\dfrac{156\cdot\left(260-10\cdot26\right)}{15,6\cdot3,3\cdot3,4\cdot2,6}\)
\(=\dfrac{156\cdot0}{15,6\cdot3,3\cdot3,4\cdot2,6}\)
\(=\dfrac{0}{15,6\cdot3,3\cdot3,4\cdot2,6}\)
\(=0\)
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