Ответ:
- \(\frac5{12}+\frac14=\frac5{12}+\frac3{12}=\frac23\).
- \(7-4\frac78=6\frac88-4\frac78=2\frac18\).
- \(5\frac45+4\frac34=\frac{96}{20}+\frac{95}{20}=\frac{191}{20}=9\frac{11}{20}\).
- \(6\frac{11}{30}-4\frac{17}{20}=\frac{382}{60}-\frac{291}{60}=\frac{91}{60}=1\frac{31}{60}\).
- \(\frac3{10}\times\frac56=\frac{15}{60}=\frac14\).
- \(4\frac45\times\frac{15}{16}=\frac{24}{5}\times\frac{15}{16}=\frac92=4\frac12\).
- \(\frac53:\frac{10}{9}=\frac53\times\frac9{10}=\frac32=1\frac12\).
- \(24:3\frac15=24:\frac{16}{5}=24\times\frac5{16}=\frac{15}{2}=7\frac12\).
Ответ: 1) \(\frac23\); 2) \(2\frac18\); 3) \(9\frac{11}{20}\); 4) \(1\frac{31}{60}\); 5) \(\frac14\); 6) \(4\frac12\); 7) \(1\frac12\); 8) \(7\frac12\).
