Question

Сократите дроби №1а) 24/60, 12/48, 14/56; б) 36/60, 18/90, 66/99, 9 Сократите дроби №1а) 24/60, 12/48, 14/56; б) 36/60, 18/90, 6Сократите дроби №1а) 24/60, 12/48, 14/56; б) 36/60, 18/90, 66/99, 9

Сократите дроби №1
а) 24/60, 12/48, 14/56; б) 36/60, 18/90, 66/99, 98/112;

Приведите дроби к наименьшему общему знаменателю:

a)1/3 и 1/2 б) 2/5 и 3/4 В) 5/6 и 5/7 г) 9/10 и 2/9

3/8 и 1/4 8/9 и 2/3 7/15 и 3/5 5/18 и 4/9

3/4 и 5/6 1/6 и 5/9 3/10 и 8/15 3/8 и 5/12


Сравните дроби

а)3/5 u 2/3 б) 3/10 u 7/30 в) 4/15 u 11/60 г) 7/9 u 6/7

Answer 1

№1
а)
$\frac{24}{60} = \frac{2}{5} =0.4$
$\frac{12}{48} = \frac{1}{4} =0.25$
$\frac{14}{56} = \frac{1}{4} =0.25$
б)
$\frac{36}{60}= \frac{18}{30} = \frac{9}{15} = \frac{3}{5}$
$\frac{18}{90} = \frac{9}{45} = \frac{1}{5}$
$\frac{66}{99} = \frac{22}{33}= \frac{2}{3}$
$\frac{98}{112}= \frac{49}{56} = \frac{7}{8}$
№2
a)
$\frac{1}{3} (*2); \frac{1}{2} (*3) = \frac{2}{6} ; \frac{3}{6}$
$\frac{9}{10} (*9) ; \frac{2}{9} (*10)= \frac{81}{90} ; \frac{20}{90}$
$\frac{3}{8} (*1); \frac{1}{4} (*2) = \frac{3}{8} ; \frac{2}{8}$
$\frac{5}{18} (*1) ; \frac{4}{9} (*2)= \frac{5}{18} ; \frac{8}{18}$
$\frac{3}{4} (*3) ; \frac{5}{6} (*2)= \frac{9}{12} ; \frac{10}{12}$
$\frac{3}{8} (*3) ; \frac{5}{12} (*2)= \frac{9}{24} ; \frac{10}{24}$
б)
$\frac{2}{5} (*4); \frac{3}{4} (*5) = \frac{8}{20} ; \frac{15}{20}$
$\frac{8}{9} (*1) ; \frac{2}{3}(*3) = \frac{8}{9} ; \frac{6}{9}$
$\frac{1}{6} (*3); \frac{5}{9} (*2) = \frac{3}{18} ; \frac{10}{18}$
в)
$\frac{5}{6}(*7) ; \frac{5}{7} (*6)= \frac{35}{42} ; \frac{30}{42}$
$\frac{7}{15}; \frac{3}{5} (*3) = \frac{7}{15} ; \frac{9}{15}$
$\frac{3}{10}(*3) ; \frac{8}{15}(*2) = \frac{9}{30} ; \frac{16}{30}$
№3
а)
$\frac{3}{5}(*3) ; \frac{2}{3}(*5) = \frac{9}{15} \ \textless \ \frac{10}{15}$
б)
$\frac{3}{10} (*3); \frac{7}{30} = \frac{9}{30} \ \textgreater \ \frac{7}{30}$
в)
$\frac{4}{15}(*4); \frac{11}{60} = \frac{16}{60} \ \textgreater \ \frac{11}{60}$
г)
$\frac{7}{9} (*7); \frac{6}{7} (*9)= \frac{49}{63} \ \textless \ \frac{54}{63}$