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a) 1/2
b) 18/17; 17/16; 16/15; 15/14; 14/13; 13/12; 10/9
Nhớ k cho mk nha
a)1/2
b)Vì 18/17 <17/16 <16/15<15/14< 14/13< 13/12< 10/9
Nên, ta có:
18/17; 17/16; 16/15; 15/14; 14/13; 13/12; 10/9.
a) \(3\frac{2}{7}=\frac{3.7+2}{7}=\frac{23}{7}\) b) \(2\frac{5}{12}=\frac{2.12+5}{12}=\frac{29}{12}\)
c) \(9\frac{5}{9}=\frac{9.9+5}{9}=\frac{86}{9}\) d) \(12\frac{3}{4}=\frac{12.4+3}{4}=\frac{51}{4}\)
a . \(3\frac{2}{7}=\frac{3\cdot7+2}{7}=\frac{23}{7}\)
b . \(2\frac{5}{12}=\frac{2\cdot12+5}{12}\frac{29}{12}\)
c . \(9\frac{5}{9}=\frac{9\cdot9+5}{9}=\frac{86}{9}\)
d . \(12\frac{3}{4}=\frac{12\cdot4+3}{4}=\frac{51}{4}\)
\(3\frac{1}{2}=\frac{3.2+1}{2}=\frac{7}{2}\)
\(13\frac{2}{3}=\frac{13.3+2}{3}=\frac{41}{3}\)
\(5\frac{7}{8}=\frac{5.8+7}{8}=\frac{47}{8}\)
\(17\frac{1}{4}=\frac{17.4+1}{4}=\frac{69}{4}\)
\(4\frac{2}{9}=\frac{4.9+2}{9}=\frac{38}{9}\)
\(21\frac{5}{9}=\frac{21.9+5}{9}=\frac{194}{9}\)
\(10\frac{5}{8}=\frac{10.8+5}{8}=\frac{85}{8}\)
\(14\frac{1}{5}=\frac{14.5+1}{5}=\frac{71}{5}\)
Bài 2:
a, \(\dfrac{5}{23}\) \(\times\) \(\dfrac{17}{26}\) + \(\dfrac{5}{23}\) \(\times\) \(\dfrac{9}{26}\)
= \(\dfrac{5}{23}\) \(\times\) ( \(\dfrac{17}{26}\) + \(\dfrac{9}{26}\))
= \(\dfrac{5}{23}\) \(\times\) \(\dfrac{26}{26}\)
= \(\dfrac{5}{23}\)
b, \(\dfrac{3}{4}\) \(\times\) \(\dfrac{7}{9}\) + \(\dfrac{7}{4}\) \(\times\) \(\dfrac{3}{9}\)
= \(\dfrac{7}{12}\) + \(\dfrac{7}{12}\)
= \(\dfrac{14}{12}\)
= \(\dfrac{7}{6}\)
b) 4 1/8 : (4 - 1/4) = 33 /8 : ( 16/4 - 1/4) = 33/8 : 15/4 = 11/10
c) 1 4/35 + 3 4/7 * 3 1/5 = 39/35 + 25/7 * 16/5 = 39/35 + 80/7 = 39/35 + 400/35 = 439/35
a. \(\frac{79}{8}=9\frac{7}{8}\)
b. \(\frac{64}{7}=9\frac{1}{7}\)
c. \(\frac{365}{4}=91\frac{1}{4}\)
d. \(\frac{123}{5}=24\frac{3}{5}\)
8/3=\(2\frac{2}{3}\)
17/4=\(4\frac{1}{4}\)
9/5\(=1\frac{4}{5}\)
14/16=\(0\frac{7}{8}\)
a) 8/3=2_2/3
b) 9/5=1_4/5
c) 17/4=4_1/4
d) 14/16=..._.../...