Ответ:
- \(\frac35+3\frac25=3+\left(\frac35+\frac25\right)=3+1=4\).
- \(6\frac1{25}+2\frac{24}{25}=(6+2)+\left(\frac1{25}+\frac{24}{25}\right)=8+1=9\).
- \(4\frac25+1\frac35=(4+1)+\left(\frac25+\frac35\right)=5+1=6\).
- \(5\frac{12}{31}+\frac{19}{31}=5+\frac{12+19}{31}=5+1=6\).
