Quy đồng mẫu số các phân số

\(\dfrac{63}{18}và\dfrac{4}{18}\)

\(\dfrac{18}{21}và\dfrac{17}{21}\)

\(\dfrac{24}{36};\dfrac{9}{36}và\dfrac{20}{36}\)

\(7/2=63/18; 4/18\)

\(18/21; 17/21\)

\(9/36; 20/36\) =)

99/54=11/6=143/78

54/78=9/13=54/78

143/78

54/78

Ta có: \(\dfrac{99}{54}=\dfrac{11}{6}\);\(\dfrac{54}{78}=\dfrac{9}{13}\)

Quy đồng mẫu số hai phân số: \(\dfrac{11}{6}=\dfrac{143}{78}\);\(\dfrac{9}{13}=\dfrac{54}{78}\)

6236/24267<1<727628/45726

C

c

C

24/16=12/8=6/4

7/4=7/4

24/16=12/8=6/4

7/4=7/4

=

4/13=48/156

5/12=65/156

6/13=72/156

7/12=91/156

4/13=48/156

5/12=65/156

6/13=72/156

7/12=91/156

lm bài mấy v bn?

kiểm tra??????

\(\dfrac{2}{3}\) = \(\dfrac{2x5}{3x5}\) = \(\dfrac{10}{15}\)     ;     \(\dfrac{4}{5}\) = \(\dfrac{4x3}{5x3}\) = \(\dfrac{12}{15}\)

\(\dfrac{3}{4}\) = \(\dfrac{3x4}{4x4}\) = \(\dfrac{12}{16}\)     ;     \(\dfrac{5}{8}\) = \(\dfrac{5x2}{8x2}\) = \(\dfrac{10}{16}\)        ;   \(\dfrac{7}{16}\) giữ nguyên

kết quả bằng 3 nhé

cảm ơn

74/7

74/7

=504/7+2/7=506/7