Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a)\(3\frac{4}{10}>2\frac{9}{10}\)
b)\(3\frac{4}{10}< 3\frac{9}{10}\)
c)\(5\frac{1}{10}>2\frac{9}{10}\)
d)\(3\frac{4}{10}=3\frac{2}{5}\)
Hok tốt!~
3 9/10 > 2 9/10 3 4/10 < 3 9/10
5 1/10 > 2 9/10 3 4/10 = 3 2/5
Nếu sai thì cho mình xin lỗi, chúc bạn học tốt!
Bài 2 : So sánh các hỗn số:
\(a)\)\(3\frac{9}{10}\)và \(2\frac{9}{10}\)
\(3\frac{9}{10}=\frac{39}{10}\)
\(2\frac{9}{10}=\frac{29}{10}\)
Vì \(\frac{39}{10}>\frac{29}{10}\)
\(\Rightarrow\)\(3\frac{9}{10}>2\frac{9}{10}\)
\(b)\)\(3\frac{4}{10}\)và \(3\frac{9}{10}\)'
\(3\frac{4}{10}=\frac{34}{10}\)
\(3\frac{9}{10}=\frac{39}{10}\)
Vì \(\frac{34}{10}< \frac{39}{10}\)
\(\Rightarrow\)\(3\frac{4}{10}< 3\frac{9}{10}\)
\(c)\)\(5\frac{1}{10}\)và \(2\frac{9}{10}\)
\(5\frac{1}{10}=\frac{51}{10}\)
\(2\frac{9}{10}=\frac{29}{10}\)
Vì: \(\frac{51}{10}>\frac{29}{10}\)
\(\Rightarrow\)\(5\frac{1}{10}>2\frac{9}{10}\)
\(d)\)\(3\frac{4}{10}\)và \(3\frac{2}{5}\)
\(3\frac{4}{10}=\frac{34}{10}=\frac{17}{5}\)
\(3\frac{2}{5}=\frac{17}{5}\)
Vì: \(\frac{17}{5}=\frac{17}{5}\)
\(\Rightarrow\)\(3\frac{4}{10}=3\frac{2}{5}\)
a; Cách một:
\(\dfrac{2}{9}\) = \(\dfrac{2\times2}{9\times2}\) = \(\dfrac{4}{18}\) < \(\dfrac{4}{10}\) Vậy \(\dfrac{2}{9}\) < \(\dfrac{4}{10}\)
\(\dfrac{4}{9}\) = \(\dfrac{4\times3}{9\times3}\) = \(\dfrac{12}{27}\); \(\dfrac{6}{10}\) = \(\dfrac{6\times2}{10\times2}\) = \(\dfrac{12}{20}\)
Vì \(\dfrac{12}{27}\) < \(\dfrac{12}{20}\) vậy \(\dfrac{4}{9}\) < \(\dfrac{12}{20}\)
\(\dfrac{3}{8}\) = \(\dfrac{3\times4}{8\times4}\) = \(\dfrac{12}{24}\); \(\dfrac{4}{7}\) = \(\dfrac{4\times3}{7\times3}\) = \(\dfrac{12}{21}\)
Vậy \(\dfrac{3}{8}\) < \(\dfrac{4}{7}\)
\(\dfrac{5}{9}\) = \(\dfrac{5\times7}{9\times7}\) = \(\dfrac{35}{63}\); \(\dfrac{7}{10}\) = \(\dfrac{7\times5}{10\times5}\) = \(\dfrac{35}{50}\)
Vì \(\dfrac{35}{63}\) < \(\dfrac{35}{50}\) vậy \(\dfrac{5}{9}\) < \(\dfrac{7}{10}\)
Cách hai:
a; \(\dfrac{2}{9}\) = \(\dfrac{2\times10}{9\times10}\) = \(\dfrac{20}{90}\); \(\dfrac{4}{10}\) = \(\dfrac{4\times9}{10\times9}\) = \(\dfrac{36}{90}\)
Vì \(\dfrac{20}{90}\) < \(\dfrac{36}{90}\) vậy \(\dfrac{2}{9}\) < \(\dfrac{4}{10}\)
b; \(\dfrac{4}{9}\) = \(\dfrac{4\times10}{9\times10}\) = \(\dfrac{40}{90}\); \(\dfrac{6}{10}\) = \(\dfrac{6\times9}{10\times9}\) = \(\dfrac{54}{90}\)
Vì \(\dfrac{40}{90}\) < \(\dfrac{54}{90}\) vậy \(\dfrac{4}{9}\) < \(\dfrac{6}{10}\)
c; \(\dfrac{3}{8}\) = \(\dfrac{3\times7}{8\times7}\) = \(\dfrac{21}{56}\); \(\dfrac{4}{7}\) = \(\dfrac{4\times8}{7\times8}\) = \(\dfrac{32}{56}\)
Vì \(\dfrac{21}{56}\) < \(\dfrac{32}{56}\) vậy \(\dfrac{3}{8}\) < \(\dfrac{4}{7}\)
d; \(\dfrac{5}{9}\) = \(\dfrac{5\times10}{9\times10}\) = \(\dfrac{50}{90}\); \(\dfrac{7}{10}\) = \(\dfrac{7\times9}{10\times9}\) = \(\dfrac{63}{90}\)
Vì \(\dfrac{50}{90}\) < \(\dfrac{63}{90}\) vậy \(\dfrac{5}{9}\) < \(\dfrac{7}{10}\)
a: \(2\dfrac{2}{10}=2,2\)
\(4\dfrac{31}{100}=4,31\)
9/10=0,9
51/10=5,1
75/100=0,75
125/100=1,25
1075/1000=1,075
\(14\dfrac{17}{100}=14,17\)
b: 1/2=0,5
3/4=0,75
4/5=0,8
5/8=0,625
\(2\dfrac{1}{2}=2,5\)
\(3\dfrac{1}{4}=3,25\)
\(1\dfrac{3}{5}=1,6\)
\(4\dfrac{3}{8}=4,375\)
a). 3 9/10 > 2 9/10
b).3 4/10 < 3 9/10
c).5 1/10 > 2 9/10
d).3 4/10 = 3 2/5
3 9/10 >2 9/10
3 4/10<3 9 /10
5 1/10>2 9/10
3 4/10=3 2/10