Question

Помогите пожалуйста с номером 398 сложение срочно

Answer 1

Ответ:

$1)\frac{13}{24}+\frac{7}{12}+\frac{5}{6}=\frac{13}{24}+\frac{14}{24}+\frac{20}{24}=\frac{13+14+20}{24}=\frac{47}{24}=\boxed{1\frac{23}{24}}\\2)\frac{1}{2}+\frac{3}{5}+\frac{2}3}=\frac{15}{30}+\frac{18}{30}+\frac{20}{30}=\frac{15+18+20}{30}=\frac{53}{30}=\boxed{1\frac{23}{30}}\\3)\frac{3}{8}+\frac{11}{12}+\frac{3}{4}=\frac{9}{24}+\frac{22}{24}+\frac{18}{24}=\frac{9+22+18}{24}=\frac{49}{24}=\boxed{2 \frac{1}{24}}$

$4)\frac{5}{12}+\frac{13}{30}+\frac{19}{20}=\frac{25}{60}+\frac{26}{60}+\frac{57}{60}=\frac{25+26+57}{60}=\frac{108}{60}=\frac{9}{5}=\boxed{1\frac{4}{5}=1.8}\\5)\frac{7}{40}+\frac{9}{16}+\frac{3}{5}=\frac{14}{80}+\frac{45}{80}+\frac{48}{80}=\frac{14+45+48}{80}=\frac{107}{80}=\boxed{1\frac{27}{80}}\\6)\frac{3}{4}+\frac{7}{9}+\frac{29}{36}=\frac{27}{36}+\frac{28}{36}+\frac{29}{36}=\frac{27+28+29}{36}= \frac{84}{36}=\frac{7}{3}=\boxed{2\frac{1}{3}}$

Пошаговое объяснение: