Question

выполни действия 5/24+7/60

11/21-3/35

5/42+10/63


19/60-8/45


5/18+9/24-7/12

3/20-2/25+1/30


ПЖ

Answer 1

1)
$\frac{5}{24} + \frac{7}{60} = \frac{25 + 14}{120} = \frac{39}{120} = \frac{13}{40}$
2)
$\frac{11}{21} - \frac{3}{35} = \frac{55 - 9}{105} = \frac{46}{105}$
3)
$\frac{5}{42} + \frac{10}{63} = \frac{15 + 20}{126} = \frac{35}{120} = \frac{5}{18}$
4)
$\frac{19}{60} - \frac{8}{45} = \frac{57 - 30}{180} = \frac{25}{180} = \frac{5}{36}$
5)
$\frac{5}{18} + \frac{9}{24} - \frac{7}{12} = \frac{5}{18} + \frac{3}{8} - \frac{7}{12} = \frac{20 + 27 - 42}{72} = \frac{5}{72}$
6)
$\frac{3}{20} - \frac{2}{25} + \frac{1}{30} = \frac{45 - 24 + 10}{300} = \frac{31}{300}$