Question

e chỉ cần bài 1thôi ạ 

Tks😃

 

 

 

Answer 1

bài 1

a. 21/5

b. 3/8

c. 5/6

d. 6/5

Answer 2

a, \(3+\dfrac{6}{5}=\dfrac{21}{5}\)

b, \(\dfrac{5}{8}-\dfrac{1}{4}=\dfrac{3}{8}\)

c, \(\dfrac{7}{6}\times\dfrac{5}{7}=\dfrac{5}{6}\)

d, \(\dfrac{3}{5}:\dfrac{2}{4}=\dfrac{3}{5}.\dfrac{4}{2}=\dfrac{12}{10}=\dfrac{6}{5}\)

Answer 3

a, \(\dfrac{12}{7}-\dfrac{3}{4}\times\dfrac{4}{9}=\dfrac{12}{7}-\dfrac{1}{3}=\dfrac{29}{21}\)

b, \(\dfrac{3}{8}\times\dfrac{2}{9}:\dfrac{5}{4}=\dfrac{1}{12}.\dfrac{4}{5}=\dfrac{1}{15}\)

Answer 4

1:

a,3/1 + 6/5 = 15/5 + 6/5 =  21/5

b,20/32 - 8/32 = 22/32

c,5/6

d,3/5 x 4/2 = 12/10 = 6/5