tim cac p/so lon hon \(\dfrac{1}{4}\) ma nho hon \(\dfrac{3}{5}\) va co mau la 20
tim cac p/so co mau la 150 ma nho hon \(\dfrac{7}{15}\) nhung nho hon \(\dfrac{12}{25}\)
bai 3 tim x thuoc N , SAO CHO
a, \(\dfrac{1}{5}\) <\(\dfrac{x}{30}\)<\(\dfrac{1}{4}\) b, \(\dfrac{5}{8}\) < \(\dfrac{4}{x}\)
bai 4 : rut gon roi quy dong
a, \(\dfrac{51}{35}\) , \(\dfrac{60}{108}\) , \(\dfrac{26}{156}\)
b , \(\dfrac{165}{270}\) , \(\dfrac{91}{156}\) , \(\dfrac{201}{1134}\)
bt 5 xap xep theo thu tu tang dan
a , \(\dfrac{38}{45}\) , \(\dfrac{7}{2}\), \(\dfrac{17}{20}\), \(\dfrac{13}{10}\)
b , \(\dfrac{3}{124}\) , \(\dfrac{1}{41}\), \(\dfrac{5}{207}\), \(\dfrac{3}{83}\)
cau b bai 3 thieu
b, 58/58 < 4x < 3/5