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\(\dfrac{2}{3}\) : \(\dfrac{1}{4}\) = \(\dfrac{8}{3}\) = \(\dfrac{8\times3}{3\times3}\) = \(\dfrac{24}{9}\); \(\dfrac{5}{9}\)
MSC nhỏ nhất là 36
\(\dfrac{2}{3}=\dfrac{2\times12}{3\times12}=\dfrac{24}{36}\)
\(\dfrac{1}{4}=\dfrac{1\times9}{4\times9}=\dfrac{9}{36}\)
\(\dfrac{5}{9}=\dfrac{5\times4}{9\times4}=\dfrac{20}{36}\)
\(\frac{5}{6}\)và\(\frac{1}{4}\)
Ta có: Mẫu số chung: 12
\(\Rightarrow\frac{5}{6}=\frac{5\cdot2}{6\cdot2}=\frac{10}{12};\frac{1}{4}=\frac{1\cdot3}{4\cdot3}=\frac{3}{12}\)
\(\text{Ta có:}\)
\(\frac{8}{15}=\frac{8.5}{15.5}=\frac{40}{75}\)
\(\frac{6}{25}=\frac{6.3}{25.3}=\frac{18}{75}\)
\(\text{Vậy...}\)
bài3
1. \(\frac{4}{3}\)= \(\frac{4x4}{3x4}\)=\(\frac{20}{12}\)
\(\frac{3}{4}\)=\(\frac{3x3}{4x3}\)=\(\frac{9}{12}\)
2.\(\frac{5}{4}\)=\(\frac{5x6}{4x6}\)=\(\frac{30}{24}\)
\(\frac{5}{6}\)=\(\frac{5x4}{6x4}\)=\(\frac{20}{24}\)
3.\(\frac{3}{8}\)=\(\frac{3x6}{8x6}\)=\(\frac{18}{48}\)
\(\frac{1}{6}\)=\(\frac{1x6}{6x8}\)=\(\frac{6}{48}\)
4.\(\frac{2}{5}\)=\(\frac{2x7}{5x7}\)=\(\frac{14}{35}\)
\(\frac{4}{7}\)=\(\frac{4x5}{7x5}\)=\(\frac{20}{35}\)
Ta co : 3/4 = 3 x 2/4 x 2 = 6/8 ; 5/8
Vay 2 phan so la 6/8 ; 5/8 va mau nho nhat la 8
9/13=63/91
8/7=104/91
3/4=36/48
5/12=20/48 nha
~HT~
k cho mình nha
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\(\dfrac{1}{8}=\dfrac{1\cdot7}{8\cdot7}=\dfrac{7}{56}\)
\(\dfrac{5}{56}=\dfrac{5\cdot1}{56\cdot1}=\dfrac{5}{56}\)
\(\dfrac{4}{32}=\dfrac{1}{8}=\dfrac{1\cdot7}{8\cdot7}=\dfrac{7}{56}\)