3 phan 2

12 phan 4 bang 3

9 phan 7

tk nha

\(\frac{9}{6}=\frac{9\div3}{6\div3}=\frac{3}{2}\)

\(\frac{12}{4}=\frac{12:4}{4:4}=\frac{3}{1}=3\)

\(\frac{90}{70}=\frac{90:10}{70:10}=\frac{9}{7}\)

rút gọn bằng cách chia nha

k mik nha bn

9 phần 6 = 3 phan 2

12 phần 4 =3

90 phần 70= 9 phần 7

tk cho minh nha 

chuc ban hoc gioi

Phân số tối giản là: 5/7, 23/24

Phân số rút gọn là: 6/9, 12/24, 6/14

6/9=2/3   12/24=1/2   6/14=3/7

Phân số tối giản là \(\frac{5}{7};\frac{23}{24}\)

Phân số rút gọn được là \(\frac{6}{9};\frac{12}{24};\frac{6}{14}\)

Rút gọn \(\frac{6}{9}=\frac{2}{3};\frac{12}{24}=\frac{1}{2};\frac{6}{14}=\frac{3}{7}\)

15151515/49494949 = 15/49

128128128/256256256 = 1/2

15/49

1/2

Đúng không

\(\frac{44116-14}{10290-35}=\frac{44102}{10255}\)

\(\frac{3600-75}{8400-175}=\frac{75\left(48-1\right)}{35\left(240-5\right)}=\frac{15\cdot47}{7\cdot235}=\frac{3\cdot5\cdot47}{7\cdot5\cdot47}=\frac{3}{7}\)

g, \(\frac{44116-14}{10290-35}=\frac{44102}{10255}\)

h, \(\frac{3600-75}{8400-175}=\frac{3525}{8225}=\frac{3}{7}\)

\(\frac{3.4+3}{6.5+9}=\frac{3.(4+1)}{3.10.3.3}=\frac{3.5}{3.(10+3)}=\frac{3.5}{3.13}=\frac{5}{14}\)

\(\frac{6 . 9 - 2.17}{63 . 3 - 119}=\frac{3 . ( 17 + 1 )-2 . 17}{189 - 119}\)

\(=\frac{3.17+3-2.17}{70}=\frac{\left(3-2\right).17+3}{70}\)

\(=\frac{17+3}{70}=\frac{20}{70}=\frac{2}{7}\)

\(a.\frac{4.7}{9.32}=\frac{4.7}{4.8.9}=\frac{7}{8.9}=\frac{7}{72}\)

\(b.\frac{990}{2610}=\frac{990\div90}{2610\div90}=\frac{11}{29}\)

\(c.\frac{374}{-506}=\frac{374\div\left(-22\right)}{-506\div\left(-22\right)}=\frac{-17}{23}\)

\(\frac{4\cdot7}{9\cdot32}=\frac{4\cdot7}{9\cdot4\cdot8}=\frac{7}{9\cdot8}=\frac{7}{72}\)

\(\frac{990}{2610}=\frac{2\cdot3^2\cdot5\cdot11}{2\cdot3^2\cdot5\cdot29}=\frac{11}{29}\)

\(\frac{374}{-506}=-\frac{374}{506}=\frac{2\cdot11\cdot17}{2\cdot11\cdot23}=-\frac{17}{23}\)

a, \(\frac{4.7}{9.32}=\frac{2.2.7}{9.2.2.8}=\frac{7}{72}\)

b, \(\frac{990}{2610}=\frac{990:90}{2610:90}=\frac{11}{29}\)

c, \(\frac{374}{-506}=\frac{374:22}{-506:22}=\frac{17}{-23}=-\frac{17}{23}\)

a)\(\frac{16}{20}=\frac{4}{5};\frac{9}{15}=\frac{3}{5}\)

Vì 4>3\(\Rightarrow\frac{4}{5}>\frac{3}{5}\) hay \(\frac{16}{20}>\frac{9}{15}\)

Vậy \(\frac{16}{20}>\frac{9}{15}\)

b) \(\frac{6}{8}=\frac{3}{4};\frac{3}{12}=\frac{1}{4}\)

Vì 3>1 \(\Rightarrow\frac{3}{4}>\frac{1}{4}\) hay \(\frac{6}{8}=\frac{3}{12}\)

Vậy \(\frac{6}{8}=\frac{3}{12}\)

c) \(\frac{15}{25}=\frac{3}{5};\frac{36}{45}=\frac{4}{5}\)

Vì 3<4 \(\Rightarrow\frac{3}{5}<\frac{4}{5}\) hay \(\frac{15}{25}<\frac{36}{45}\)

Vậy \(\frac{15}{25}<\frac{36}{45}\)

Neu ban nao dung thi minh tich cho nhe

_{minh khong biet dap an cua cau hoi nay} 

\(\frac{9^9\cdot225^5\cdot8^7}{18^{12}\cdot625^3\cdot24^3}=\frac{9^9\cdot\left(\left(3\cdot5\right)^2\right)^5\cdot8^7}{\left(9\cdot2\right)^{12}\cdot\left(\left(5^2\right)^2\right)^3\cdot\left(8\cdot3\right)^3}\)

\(=\frac{1}{9^3\cdot2^{12}}\cdot\frac{9^5\cdot5^{10}}{5^{12}}\cdot\frac{8^7}{8^3\cdot3^3}\)

\(=\frac{9^2\cdot8^4}{2^{12}\cdot5^2\cdot3^3}\)

\(=\frac{9\cdot\left(2^4\right)^3}{\left(2^4\right)^3\cdot5^2}\)

\(=\frac{9}{25}\)

b là 3/2 k phải 9

a)\(\frac{4.3}{9.32}=\frac{1}{3.8}=\frac{1}{24}\)

b)\(\frac{9.6-9.3}{18}=\frac{9.3}{9.2}=\frac{9}{1}=9\)

c)\(\frac{232323}{494949}=\frac{232323:10101}{494949:10101}=\frac{13}{49}\)

còn c ở tử là 23 k phải 13 dù cùng chia cho 10101