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\(\dfrac{11}{10}< \dfrac{9}{30}\)
\(\dfrac{6}{7}>\dfrac{3}{5}\)
\(\dfrac{25}{100}< \dfrac{3}{4}\)
a \(\dfrac{11}{10}>\dfrac{3}{10}\)
b \(\dfrac{30}{35}>\dfrac{21}{35}\)
c \(\dfrac{1}{4}< \dfrac{3}{4}\)
a)
\(\dfrac{6}{12}=\dfrac{6:6}{12:6}=\dfrac{1}{2}\)
\(\Rightarrow\dfrac{1}{2}=\dfrac{1\times2}{2\times2}=\dfrac{2}{4}\)
Mà \(\dfrac{2}{4}< \dfrac{3}{4}\)
Vậy \(\dfrac{6}{12}< \dfrac{3}{4}\).
b)
\(\dfrac{8}{10}=\dfrac{8:2}{10:2}=\dfrac{4}{5}\)
Mà \(\dfrac{2}{5}< \dfrac{4}{5}\)
Vậy \(\dfrac{2}{5}< \dfrac{8}{10}\).
c)
\(\dfrac{40}{35}=\dfrac{40:5}{35:5}=\dfrac{8}{7}\)
Mà \(\dfrac{8}{7}>\dfrac{6}{7}\)
Vậy \(\dfrac{40}{35}>\dfrac{6}{7}\).
d)
\(\dfrac{8}{16}=\dfrac{8:8}{16:8}=\dfrac{1}{2}\)
Mà \(\dfrac{1}{2}< \dfrac{5}{2}\)
Vậy \(\dfrac{8}{16}< \dfrac{5}{2}\).
\(\frac{2}{7}=\frac{2.9}{7.9}=\frac{18}{63}\)
\(\frac{4}{9}=\frac{4.7}{9.7}=\frac{28}{63}\)
\(Vì\frac{18}{63}<\frac{28}{63}nên\frac{2}{7}<\frac{4}{9}\)
Các câu khác tương tự !!
Bài 1: Quy đồng => so sánh => trả về phân số ban đầu
Bài 2: Như bài 1
Bài 1
a) 4/3 < 1/3
b) 2/5 < 3/2
c) 7/2 > 1/4
d) 3/4 < 5/6
Bài 2
a) 6/10 = 3/5 và 4/5 vậy 3/5 < 4/5
b) 3/4 và 6/12 = 1/2 vậy 3/4 > 1/2
a) \(\dfrac{6}{14}=\dfrac{6:2}{14:2}=\dfrac{3}{7}\)
\(\dfrac{3}{7}< \dfrac{4}{7}\)
b) \(\dfrac{6}{15}=\dfrac{6:3}{15:3}=\dfrac{2}{5}\)
\(\dfrac{3}{5}>\dfrac{2}{5}\)
c) \(\dfrac{10}{18}=\dfrac{10:2}{18:2}=\dfrac{5}{9}\)
\(\dfrac{5}{9}>\dfrac{2}{9}\)
1.a) 3/4 > 5/10
b) 35/25 > 16/14
2.a) 7/5 > 5/7
b) 14/16 < 24/21
HT nha
( bạn t.i.c.k cho mik nha, mik cảm ơn )
a) \(\dfrac{2}{5}=\dfrac{4}{10}\)
\(\dfrac{4}{10}>\dfrac{3}{10}\)
b) \(\dfrac{5}{6}=\dfrac{10}{12}\)
\(\dfrac{7}{12}< \dfrac{10}{12}\)
c) \(\dfrac{1}{2}=\dfrac{2}{4}\)
\(\dfrac{3}{4}< \dfrac{2}{4}\)
d) \(\dfrac{8}{3}=\dfrac{56}{21}\)
\(\dfrac{56}{21}>\dfrac{11}{21}\)
A
\(\frac{3}{4}=\frac{15}{20}\) \(\frac{4}{5}=\frac{16}{20}\)
\(\Rightarrow\frac{3}{4}< \frac{4}{5}\)
- 3/4 < 4/3 (vì 3/4 < 1 < 4/3 nên 3/4 < 4/3).
- 10/7 > 7/9 (vì 10/7 > 1 > 7/9 nên 10/7 > 7/9).
- 12/11 > 11/10 (vì 12/11 > 1 > 11/10 nên 12/11 > 11/10).
3/4 < 4/3 vi 3/4 be hon 1con 4/3 lon hon 1
10/7 > 7/9 vi 10/7 lon hon 1 con 7/9 be hon 1
12/11 > 11/10 vi 12/11 lon hon 1 con 11/10 be hon 1
3/7 > 6/10
3/7<6/10