Помогите пожалуйста буду благодарен

1)4 $\frac{3}{5}$ +2 $\frac{5}{7}$ +5 $\frac{9}{35}$ =4 $\frac{21}{35}$ +2 $\frac{25}{35}$ +5 $\frac{9}{35}$ =11 $\frac{55}{35}$ =12 $\frac{20}{35}$ =12 $\frac{4}{7}$
3)8/tex]+12[tex] \frac{11}{20} " alt=" \frac{3}{40} [/tex]+12[tex] \frac{11}{20} " align="absmiddle" class="latex-formula">+6 $\frac{7}{80}$ =8 $\frac{6}{80}$ +12 $\frac{44}{80} +6 \frac{7}{80} =26 \frac{57}{80}$
5) $5 \frac{2}{5} +19 \frac{9}{10} +4 \frac{33}{50} =5 \frac{20}{50} +19 \frac{45}{50} +4 \frac{33}{50} =28 \frac{98}{50} =29 \frac{48}{50}$