mọi người giúp mình bài

3636/4545+x=4848/1515

x=4848/1515-3636/4545

x=14544/4545-3636/4545

x=10908/4545

3535/5050-x=8/25

x=3535/5050-1616/5050

x=1919/5050

Đáp án lần lượt là: \(\frac{23}{36};\frac{31}{7};\frac{1}{6};\frac{3}{5}\)

#Hk_tốt

#Ken'z

NGọc Ken nhanh nhất

a, 16/36 = 4/9 > 20/45 > 5/45 > 5/48

=> 16/36 > 5/48

b, 6/31 < 6/30 = 1/5 = 7/35 < 8/35

=> 6/31 < 8/35

c, 12/165 > 10/165 > 10/200 = 1/20 > 1/50 = 9/450

=> 12/165 > 9/450

~~Hok tốt~~

a)16/36>9/72 và 9/72>5/48 =>16/36>5/48

b)6/31<1/5 và 1/5<8/35 => 6/31<8/35

c)12/165>1/15 và 1/15>9/450 => 12/165>9/450

chúc bạn học tốt nha

54/12:64/12=27/32

56/45x54/51=112/85

56/20+58/21=584/105

21/78-12/78=3/26

a).27/32

b).336/305

c).584/105

d).3/26

\(\frac{3}{6.8}+\frac{3}{8.10}+.......+\frac{3}{198.200}\)

\(=\frac{3}{2}.\left(\frac{2}{6.8}+\frac{2}{8.10}+........+\frac{2}{198.200}\right)\)

\(=\frac{3}{2}.\left(\frac{1}{6}-\frac{1}{8}+\frac{1}{8}-\frac{1}{10}+........+\frac{1}{198}-\frac{1}{200}\right)\)

\(=\frac{3}{2}.\left(\frac{1}{6}-\frac{1}{200}\right)\)

\(=\frac{3}{2}.\frac{97}{600}=\frac{97}{400}\)

\(3.\left(\frac{2}{6.8}+\frac{2}{8.10}+....+\frac{2}{198.200}\right).\frac{1}{2}\)

=\(3.\left(\frac{1}{6}-\frac{1}{8}+\frac{1}{8}-\frac{1}{10}+...+\frac{198}{200}\right).\frac{1}{2}\)

=\(3.\left(\frac{1}{6}-\frac{1}{200}\right).\frac{1}{2}\)

=.\(3.\frac{97}{600}.\frac{1}{2}\)=97/400

\(1.a,\frac{5}{7}=\frac{5.9}{7.9}=\frac{45}{63};\frac{4}{9}=\frac{4.7}{9.7}=\frac{28}{63}.\)

\(b,\frac{7}{15},\frac{5}{3}=\frac{5.5}{3.5}=\frac{25}{15}\)

\(c,\frac{11}{12}=\frac{11.4}{12.4}=\frac{44}{48};\frac{7}{48}\)

\(d,\frac{3}{2}=\frac{3.3}{2.3}=\frac{9}{6};\frac{2}{3}=\frac{2.2}{3.2}=\frac{4}{6}\)

\(e,\frac{1}{3}=\frac{1.4}{3.4}=\frac{4}{12};\frac{5}{4}=\frac{5.3}{4.3}=\frac{15}{12};\frac{10}{12}\)

@nguyễn thị phương anh đây nhé :

\(\frac{12}{21}+\frac{11}{22}=\frac{264}{462}+\frac{231}{462}=\frac{495}{462}\)

\(\frac{9}{32}+\frac{35}{11}=\frac{99}{352}+\frac{1120}{352}=\frac{1219}{352}\)

\(\frac{12}{21}+\frac{11}{22}=\frac{4}{7}+\frac{1}{2}=\frac{8}{14}+\frac{7}{14}=\frac{15}{14}\)

\(\frac{9}{32}+\frac{35}{11}=\frac{99}{352}+\frac{1120}{352}=\frac{1219}{352}\)

Để kết quả của phép tính trên là 0 thì :

                 \(\frac{32}{46}\)X x - \(\frac{16}{23}\)X \(\frac{21}{23}\)= 0

                 \(\frac{16}{23}\)X x - \(\frac{16}{23}\)X \(\frac{21}{23}\)= 0

                           \(\frac{16}{23}\)X ( x - \(\frac{21}{23}\)) = 0

                                             x - \(\frac{21}{23}\)= 0 (   chia cả 2 vế cho \(\frac{16}{23}\))

                                                          x = 0 + \(\frac{21}{23}\)

                                                          x = \(\frac{21}{23}\)

Vậy x = \(\frac{21}{23}\)

21/23 nhe

a ,Ta có : 14/25 < 15/25 = 3/5                                                               

    Ta có : 1 - 3/5 = 2/5 

                1 - 5/7 = 2/7 

     Nên 2/5 > 2/7 

     Vậy 14/25 < 5/7 

\(\frac{14}{25}< \frac{15}{25}=\frac{3}{5}=1-\frac{3}{5}=\frac{2}{5}=1-\frac{5}{7}=\frac{2}{7}\)

Vậy 25 > 27

14/25 <5/7