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\(\dfrac{3}{2}v\text{à}\dfrac{5}{8}\\ MSC:8\\ \dfrac{3}{2}=\dfrac{3\times4}{2\times4}=\dfrac{18}{8};\dfrac{5}{8}\\ \dfrac{1}{3}v\text{à}\dfrac{4}{5}\\ MSC:15\\ \dfrac{1}{3}=\dfrac{1\times5}{3\times5}=\dfrac{5}{15};\dfrac{4}{5}=\dfrac{4\times3}{5\times3}=\dfrac{12}{15}\\ \dfrac{3}{4}v\text{à}\dfrac{9}{24}\\ MSC:24\\ \dfrac{3}{4}=\dfrac{3\times6}{4\times6}=\dfrac{18}{24}\)
a: 3/2=12/8
5/8=5/8
b: 1/3=5/15
4/5=12/15
c: 3/4=18/24
9/24=9/24
\(\dfrac{3}{4}\) = \(\dfrac{3.5}{4.5}\) = \(\dfrac{15}{20}\); \(\dfrac{4}{5}=\dfrac{4.4}{5.4}\) = \(\dfrac{16}{20}\)
\(\dfrac{4}{7}\) = \(\dfrac{4.9}{7.9}\) = \(\dfrac{36}{63}\); \(\dfrac{5}{9}\) = \(\dfrac{5.7}{9.7}\) = \(\dfrac{35}{63}\)
\(\dfrac{5}{12}\) = \(\dfrac{5.3}{12.3}\) = \(\dfrac{15}{36}\); \(\dfrac{4}{9}=\dfrac{4.4}{9.4}\) = \(\dfrac{16}{36}\)
\(\dfrac{7}{9}=\dfrac{7.8}{9.8}\) = \(\dfrac{56}{72}\) ; \(\dfrac{5}{8}\) = \(\dfrac{5.9}{8.9}\) = \(\dfrac{45}{72}\)
\(\dfrac{7\times2}{1\times2}=\dfrac{14}{2},\dfrac{9}{2};\dfrac{81\times3}{7\times3}=\dfrac{243}{21},\dfrac{9}{21}\\ \dfrac{4\times2}{3\times2}=\dfrac{8}{6},\dfrac{16}{6};\dfrac{5\times3}{2\times3}=\dfrac{15}{6},\dfrac{19\times2}{3\times2}=\dfrac{38}{6}\)
a) \(\dfrac{5}{5}\) và \(\dfrac{4}{5}\)
b) \(\dfrac{5}{9}\) và \(\dfrac{18}{9}\)
c) \(\dfrac{15}{5}\) và \(\dfrac{9}{5}\)
d) \(\dfrac{16}{4}\) và \(\dfrac{3}{4}\)
a: 1=5/5
4/5=4/5
b: 5/9=5/9
2=18/9
c: 3=15/5
9/5=9/5
d: 4=16/4
3/4=3/4
30/80 và 40/80
27/30 và 13/30
35/60 và 44/60
20/30; 24/30 và 21/30 nhé
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.\(\frac{2}{5}\)=\(\frac{2x7}{5x7}\)=\(\frac{14}{35}\)
\(\frac{4}{7}\)=\(\frac{4x5}{7x5}\)=\(\frac{20}{35}\)
Bài 1:
a: 3/4=6/8
5/8=5/8
b: 1/3=5/15
4/5=12/15
c: 3/4=18/24
9/24=9/24