Một đội công nhân trong buổi sáng đào được\(\dfrac{3}{4}\)quãng đường buổi chiều đào được \(\dfrac{1}{5}\)quãng đường.Hỏi còn bao nhiêu phần quãng đường đội đó chưa đào?

a,\(\dfrac{x}{8}\):\(\dfrac{3}{5}\)=\(\dfrac{5}{8}\)

b,\(\dfrac{4}{5}\)x χ=3

Viết Từ Lớn Đến Bé:

\(\dfrac{5}{8}\);\(\dfrac{11}{8}\);\(\dfrac{2}{4}\);\(\dfrac{26}{16}\)

a,\(\dfrac{3}{11}\)+\(\dfrac{6}{7}\)=

b,\(\dfrac{8}{15}\)x\(\dfrac{5}{6}\)-\(\dfrac{1}{3}\)=

c,\(\dfrac{7}{12}\):\(\dfrac{3}{4}\)-\(\dfrac{5}{18}\)

a,\(\dfrac{2}{3}\)x\(\dfrac{5}{2}\):\(\dfrac{9}{5}\)

b,\(\dfrac{1}{3}\)x\(\dfrac{1}{4}\)+\(\dfrac{5}{6}\)

c,\(\dfrac{1}{2}\)-\(\dfrac{7}{8}\):\(\dfrac{7}{4}\)

d,\(\dfrac{6}{5}\)-\(\dfrac{4}{5}\)x\(\dfrac{3}{2}\)

a,\(\dfrac{2}{5}\)x\(\dfrac{7}{9}\)

b,\(\dfrac{2}{3}\)x\(\dfrac{3}{4}\)x\(\dfrac{4}{5}\)

c,\(\dfrac{4}{9}\):\(\dfrac{2}{3}\)

\(\dfrac{24}{54}\)