Question

Ghi chi tiết các bc tính ra giúp mk nhé!Mk cần gấp

Answer 1

Bài 1

a) \(7\times\dfrac{3}{14}-\dfrac{1}{14}=\dfrac{21}{14}-\dfrac{1}{14}=\dfrac{20}{14}=\dfrac{10}{7}\)

b) \(\dfrac{3}{2}+\dfrac{7}{4}\times\dfrac{2}{5}=\dfrac{3}{2}+\dfrac{14}{20}=\dfrac{11}{5}\)

c) \(\dfrac{9}{8}\div3+\dfrac{7}{8}\div3=\dfrac{9}{8}\times\dfrac{1}{3}+\dfrac{7}{8}\times\dfrac{1}{3}=\dfrac{9}{24}+\dfrac{7}{24}=\dfrac{16}{24}=\dfrac{2}{3}\)

d) \(2\div\dfrac{3}{4}-\dfrac{5}{8}\times\dfrac{4}{3}=\dfrac{8}{3}-\dfrac{20}{24}=\dfrac{64}{24}-\dfrac{20}{24}=\dfrac{11}{6}\)

Answer 2

a)7x3/14-1-1/14=21/14-1/14=20/14=10/7

b)3/2+7/4x2/5=3/2+14/20=60/20+14/20=74/20=37/10

c)9/8:3+7/8:3=9/24+7/24=16/24=2/3

d)