Задача 53519 Уравнение ...
Условие
Решение
По действиям:
1)
[m]28\frac{4}{5}:13\frac{5}{7}=\frac{144}{5}\cdot :\frac{96}{6}=\frac{144}{5}\cdot \frac{6}{96}=\frac{144}{5}\cdot \frac{1}{6}=\frac{144}{30}= \frac{24}{5}=2,4[/m]
2)
[m]6\frac{3}{5}:13\frac{2}{3}=\frac{33}{5}\cdot :\frac{2}{3}=\frac{33}{5}\cdot \frac{3}{2}=\frac{99}{10}= 9,9[/m]
3)
[m]2,4+9,9=12,3[/m]
4)
[m]1\frac{11}{16}:2\frac{1}{4}=\frac{27}{16}\cdot :\frac{9}{4}=\frac{27}{16}\cdot \frac{4}{9}=\frac{3}{4}= 0,75[/m]
5)
[m]12,3:0,75=16,4[/m]
2,2)
По действиям:
1)
[m]1\frac{1}{2}+2\frac{2}{3}+3\frac{3}{4}=(1+2+3)+(\frac{1}{2}+\frac{2}{3}+\frac{3}{4})=6+(\frac{6}{12}+\frac{8}{12}+\frac{9}{12})=6+\frac{6+8+9}{12}=6+\frac{23}{12}=6+1\frac{11}{12}=7\frac{11}{12}[/m]
2)
[m]7\frac{11}{12} \cdot 3 \frac{3}{5}=\frac{95}{12}\cdot \frac{18}{5}=\frac{19}{2}\cdot \frac{3}{1}=\frac{57}{2}[/m]
3)
[m]15\frac{1}{8}:2\frac{1}{5}=\frac{121}{8}:\frac{11}{5}=\frac{121}{8}\cdot \frac{5}{11}=\frac{11}{40}[/m]
4)
[m]14 - \frac{11}{40}=13\frac{40}{40}-\frac{11}{40}=13\frac{40-11}{40}=13\frac{29}{40}[/m]
5)[m]=\frac{57}{2}:13\frac{29}{40}=\frac{57}{2}:\frac{549}{40}=\frac{57}{2}\cdot \frac{40}{549}=\frac{19\cdot 20}{183}=\frac{380}{183}=2\frac{14}{183}[/m]
Все решения
