Bài 3: So Sánh
a)\(\dfrac{13}{17}\)và\(\dfrac{25}{29}\)
b)\(\dfrac{59}{101}\)và\(\dfrac{56}{105}\)
c)\(\dfrac{14}{55}\)và\(\dfrac{20}{83}\)
d)\(\dfrac{13}{57}\)và\(\dfrac{29}{73}\)
e)\(\dfrac{17}{21}\)và\(\dfrac{1717}{2121}\)
Bài 3: So Sánh
a) \(\dfrac{13}{17}\) và \(\dfrac{25}{29}\)
b)\(\dfrac{59}{101}\)và\(\dfrac{56}{105}\)
c)\(\dfrac{14}{55}\)và\(\dfrac{20}{83}\)
d)\(\dfrac{13}{57}\)và\(\dfrac{29}{73}\)
e)\(\dfrac{17}{21}\)và\(\dfrac{1717}{2121}\)
Bài 4:Tìm các phân số có mẫu là 3 lớn hơn \(\dfrac{-1}{2}\)và nhỏ hơn \(\dfrac{1}{2}\)
bài 1 so sánh
a) \(\dfrac{45}{105}va\dfrac{84}{147}\)
b) \(\dfrac{-12}{19}va\dfrac{-14}{17}\)
c) \(\dfrac{13}{19}va\dfrac{47}{53}\)
d) \(\dfrac{-29}{38}va\dfrac{-13}{22}\)
So sánh : a, \(\dfrac{29}{60}và\dfrac{15}{28}\) b, \(\dfrac{13}{30}và\dfrac{23}{42}\) c, \(\dfrac{13}{36}và\dfrac{14}{45}\) d, \(\dfrac{1919}{9595}và\dfrac{1111}{5050}\)
a)\(\dfrac{2}{7}+\dfrac{-3}{8}+\dfrac{11}{7}+\dfrac{1}{7}_{ }+\dfrac{5}{-8}\)
b)\(\dfrac{3}{17}+\dfrac{-5}{13}+\dfrac{-18}{35}+\dfrac{14}{17}+\dfrac{17}{-35}_{ }+\dfrac{-8}{13}\)
c)\(\dfrac{-3}{8}+\dfrac{12}{25}+\dfrac{5}{-8}+\dfrac{2}{-5}+\dfrac{13}{25}\)
d)\(\dfrac{-5}{21}+\left(\dfrac{-16}{21}+1\right)\)
e)\(\dfrac{-3}{17}+\left(\dfrac{2}{3}+\dfrac{3}{17}\right)\)
f)\(\left(\dfrac{-1}{6}+\dfrac{5}{-12}\right)+\dfrac{7}{12}\)
bài 1 : so sánh :
a) \(\dfrac{23}{21}\)và\(\dfrac{21}{23}\)
b)\(\dfrac{19}{26}\)và \(\dfrac{21}{25}\)
bài 2 : sắp sếp các phân số sau từ bé đến lớn :
a)\(\dfrac{7}{36};\dfrac{24}{36};\dfrac{13}{36};\dfrac{1}{36};\dfrac{43}{36};\dfrac{36}{36}\)
b)\(\dfrac{-3}{10};\dfrac{-31}{100};\dfrac{-297}{1000};\dfrac{10000}{-3056}\)
c)\(\dfrac{13}{20};\dfrac{7}{20};\dfrac{9}{4};\dfrac{2}{5};\dfrac{1}{2}\)
d)\(\dfrac{13}{21};\dfrac{152}{17};\dfrac{13}{17};\dfrac{-5}{21}\)
e)\(\dfrac{-1}{2};\dfrac{3}{-4};\dfrac{-2}{3};\dfrac{4}{-5}\)
1.So Sánh
a) A=\(\dfrac{11}{2017}+\dfrac{4}{2019}và\) B=\(\dfrac{10}{2017}+\dfrac{10}{2019}\)
b) M=\(\dfrac{1}{5}+\dfrac{1}{12}+\dfrac{1}{13}+\dfrac{1}{14}+\dfrac{1}{30}+\dfrac{1}{61}+\dfrac{1}{62}và\dfrac{1}{2}\)
c) E=\(\dfrac{4116-14}{10290-35}và\) K=\(\dfrac{2929-101}{2.1919+404}\)
Tìm x biết :
\(2x+\dfrac{7}{6}+\dfrac{13}{12}+\dfrac{21}{20}+\dfrac{31}{30}+\dfrac{43}{42}+\dfrac{57}{56}+\dfrac{73}{72}+\dfrac{91}{90}=10\)
Bài tập: So sánh:
a, \(\dfrac{12}{49}\&\dfrac{13}{47}\)
\(b,\dfrac{64}{85}\&\dfrac{17}{35}\)
\(c,\dfrac{19}{31}\&\dfrac{17}{35}\)
(Gợi ý: a,b,c: Phân số chung gian)
\(d,\dfrac{67}{77}\&\dfrac{73}{83}\)
\(e,\dfrac{456}{461}\&\dfrac{123}{128}\)
(Gợi ý: d, e:Phần bù đến đơn vị)
