a,\(\dfrac{180}{270}=\dfrac{180:90}{270:90}=\dfrac{2}{3}\)

b,\(\dfrac{216}{225}=\dfrac{216:9}{225:9}=\dfrac{24}{25}\)

Chúc bạn học tốt!

a. 2/3

b. 72/75 (nhìn số này em mà cảm giác nó hơi sai thì chị chịu)

a,\(\dfrac{2}{3}\)

b,\(\dfrac{24}{25}\)

Câu 1:15/35=3/7

216/270=4/5

250/750=1/3

Câu 2:8/18,12/27,16/36,20/45,24/54

Câu 3:1/2=2/4=3/6=4/8=5/10

Câu 4:2×3×5/2×7×5=30/70=3/7

Tk mình nhé bn!

Bài 1:

\(\frac{15}{35}=\frac{3}{7}\)

\(\frac{216}{270}=\frac{4}{5}\)

\(\frac{250}{750}=\frac{1}{3}\)

Bài 2:

5 phân số bằng phân số \(\frac{4}{9}\) là: \(\frac{8}{18};\frac{12}{27};\frac{16}{36};\frac{20}{45};\frac{24}{54}\)

Bài 3:

\(\frac{1}{2};\frac{2}{4};\frac{3}{6};\frac{4}{8};\frac{5}{10}\)

Bài 4:

\(\frac{2x3x5}{2x7x5}=\frac{3}{7}\)

\(1\)\(\frac{15}{35}\) \(=\)\(\frac{5}{7}\)

\(\frac{216}{270}\)= \(\frac{24}{30}\)

\(\frac{250}{750}\)\(=\)\(3\)

   \(2.\)\(\frac{8}{18}\); \(\frac{12}{27}\)   ; \(\frac{16}{36}\); \(\frac{20}{45}\); \(\frac{24}{54}\)

\(\frac{1}{2}\)=\(\frac{2}{4}\)= \(\frac{3}{6}\)=\(\frac{4}{8}\)=\(\frac{5}{10}\)

4.\(2\cdot3\cdot\frac{5}{2\cdot7\cdot5}\) = \(\frac{3}{7}\)

\(\dfrac{144}{216}=\dfrac{2}{3}\)

\(\dfrac{150}{225}=\dfrac{2}{3}\)

\(\dfrac{2323}{7575}=\dfrac{23}{75}\)

\(\dfrac{-1}{13}\)

\(\dfrac{3}{5}\)

\(\dfrac{1}{6}\)

\(a,\dfrac{225}{900}=\dfrac{225:225}{900:225}=\dfrac{1}{4};b,\dfrac{125125}{250250}=\dfrac{125125:125125}{250250:125125}=\dfrac{1}{2}\)

\(\dfrac{-270}{450}=\dfrac{-9}{15}\)
\(\dfrac{11}{-143}=\dfrac{1}{-13}\)
\(\dfrac{32}{12}=\dfrac{8}{3}\)
\(\dfrac{-26}{-156}=\dfrac{1}{6}\)

\(\frac{225}{50}=\frac{9}{2}\)
Chúc bạn học tốt.

😁😁😁

TL

=9/2

Hok tốt

9/2 nhé chúc bn hok tốt

\(\frac{11}{132}=\frac{1}{12}\)

\(\frac{63}{91}=\frac{9}{13}\)

\(\frac{270}{450}=\frac{3}{5}\)

\(\frac{51}{680}=\frac{3}{40}\)

\(\frac{225}{315}=\frac{5}{7}\)

\(\frac{234}{1404}=\frac{1}{6}\)

\(\frac{11}{132}=\frac{11:11}{132:11}=\frac{1}{12}\)

\(\frac{63}{91}=\frac{63:7}{91:7}=\frac{9}{13}\)

\(\frac{270}{450}=\frac{270:90}{450:90}=\frac{3}{5}\)

\(\frac{51}{680}=\frac{51:17}{680:17}=\frac{3}{40}\)

\(\frac{225}{315}=\frac{225:45}{315:45}=\frac{5}{7}\)

\(\frac{234}{1404}=\frac{234:234}{1404:234}=\frac{1}{6}\)

11/132=1/12

63/91=9/13

270/450=3/5

51/680=3/40

225/315=5/7

234/1404=1/6