Question

a) 18/35 - 2/5 + 3/7 =

b) 11/12 - 1/3 - 1/4 =

c) 9/20 - 1/4 - 1/5 =

giúp mình với ạ,cần cần gấp

Answer 1

\(a,\) \(\dfrac{18}{35}-\dfrac{2}{5}+\dfrac{3}{7}=\dfrac{18}{35}-\dfrac{14}{35}=\dfrac{4}{35}+\dfrac{3}{7}=\dfrac{4}{35}+\dfrac{15}{35}=\dfrac{19}{35}\) 

\(b,\) \(\dfrac{11}{12}-\dfrac{1}{3}-\dfrac{1}{4}=\dfrac{11}{12}-\dfrac{4}{12}=\dfrac{7}{12}-\dfrac{1}{4}=\dfrac{7}{12}-\dfrac{3}{12}=\dfrac{5}{12}\) 

\(c,\) \(\dfrac{9}{20}-\dfrac{1}{4}-\dfrac{1}{5}=\dfrac{9}{20}-\dfrac{5}{20}=\dfrac{4}{20}-\dfrac{1}{5}=\dfrac{4}{20}-\dfrac{1}{5}=\dfrac{4}{20}-\dfrac{4}{20}=\dfrac{1}{20}\)

Answer 2

a) = 19/35

b) = 1/3

c) = 0

Answer 3

a,19/35

b,1/3

c,0

Answer 4

ghi chi tiết đc ko ạ

Answer 5

a) = 19/35

b) = 1/3

c) = 0

Answer 6

a) = 19/35

b) = 1/3

c) = 0