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Câu 1:
\(\frac{3}{8}=\frac{3x3}{8x3}=\frac{9}{24}\)
\(\frac{5}{6}=\frac{5x4}{6x4}=\frac{20}{24}\)
Câu 2:
\(\frac{5}{8}=\frac{5x3}{8x3}=\frac{15}{24}\)
\(3=\frac{72}{24}\)
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.\(\frac{2}{5}\)=\(\frac{2x7}{5x7}\)=\(\frac{14}{35}\)
\(\frac{4}{7}\)=\(\frac{4x5}{7x5}\)=\(\frac{20}{35}\)
1 , 1/6 ; 2/6 ; 3/6 ; 4/6 ; 5/6
2 . 8/7 ; 9/7 ; 10/7 ; 11/7 ; 12/7
3 , 3/4 ; 12/16 ; 18/24 ; 24/32 ; 30/40
4 , 1/4 ; 3/2 ; 2/3 ; 4/1
1.1/6,2/6,3/6,4/6,5/6.
2.8/7,9/7,10/7,11/7,12/7.
3.12/16,18/24,24/32,30/40,36/48.
4.1/4,2/3,3/2,4/1,0/5
Học giỏi
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
a, \(\frac{4}{7}\): Giữ nguyên
\(2=\frac{14}{7}\)
b, \(3=\frac{12}{4}\)
\(\frac{6}{8}=\frac{3}{4}\)
a) \(\frac{4}{7}\): Giữ nguyên
\(2=\frac{4}{7}\)
b) \(3=\frac{12}{4}\)
\(\frac{6}{8}=\frac{3}{4}\)
mẫu số chung là 12 nha
thanks