\(\frac{15}{34}-\frac{5}{17}+\frac{19}{34}-\frac{12}{17}\)
\(=\left(\frac{15}{34}+\frac{19}{34}\right)-\left(\frac{5}{17}+\frac{12}{17}\right)\)
\(=1-1=0\)
\(\frac{15}{34}-\frac{5}{17}+\frac{19}{34}-\frac{12}{17}\)
\(=\left(\frac{15}{34}+\frac{19}{34}\right)-\left(\frac{5}{17}+\frac{12}{17}\right)\)
\(=\frac{34}{34}-\frac{17}{17}\)
\(=1-1\)
\(=0\)
\(\frac{15}{34}-\frac{5}{17}+\frac{19}{34}-\frac{12}{17}\)
=\(\frac{15}{34}+\frac{19}{34}-\frac{5}{17}-\frac{12}{17}\)
=\(1-\frac{5}{17}-\frac{12}{17}\)
=\(1-\left(\frac{5}{17}+\frac{12}{17}\right)\)
=\(1-1\)
=\(0\)