Question

[Akira Cookie]

Chia phép tính :

30.395 : 217

Tính giá trị biểu thức : 5/7 : 9/14 - 17/18

Answer 1

[Sahara]

a/\(30,395:217=0,14\)(dư 0,015)
b/\(\dfrac{5}{7}:\dfrac{9}{14}-\dfrac{17}{18}\)
\(=\dfrac{5}{7}\times\dfrac{14}{9}-\dfrac{17}{18}\)
\(=\dfrac{10}{9}-\dfrac{17}{18}\)
\(=\dfrac{20}{18}-\dfrac{17}{18}\)
\(=\dfrac{3}{18}=\dfrac{1}{6}\)

Answer 2

[Bùi Thu Hà]

30395 : 217 = 140