Question

Answer 1

a) \(x+\dfrac{3}{10}=\dfrac{4}{5}\\ x=\dfrac{4}{5}-\dfrac{3}{10}=\dfrac{5}{10}=\dfrac{1}{2}\)

b) \(\dfrac{2}{3}< \dfrac{3}{3}< \dfrac{5}{4}< \dfrac{7}{4}\)

Answer 2

a 

x=4/5-3/10

x=8/10-3/10

x=5/10

x=1/2

b

sắp xếp theo thứ tự tăng dần là

2/3→3/3→7/4→5/4

Answer 3

`a)`

` x + 3/10 = 4/5`

` x = 4/5 - 3/10`

`x = 1/2`

`b)`

` 2/3 < 3/3 < 5/4 < 7/4`