Question

2 chia 5/2 trừ 3/10

Answer 1

\(2\div\dfrac{5}{2}-\dfrac{3}{10}=2\times\dfrac{2}{5}-\dfrac{3}{10}=\dfrac{4}{5}-\dfrac{3}{10}=\dfrac{8}{10}-\dfrac{3}{10}=\dfrac{5}{10}=\dfrac{1}{2}\)

Answer 2

\(2:\dfrac{5}{2}-\dfrac{3}{10}=\left(2:\dfrac{5}{2}\right)-\dfrac{3}{10}=\dfrac{4}{5}-\dfrac{3}{10}=\dfrac{8}{10}-\dfrac{3}{10}=\dfrac{8-3}{10}=\dfrac{5}{10}=\dfrac{1}{2}\)

Answer 3

1/2

Answer 4

1/2

Answer 5

\(\dfrac{1}{2}\)

Answer 6

1/2

Answer 7

ghi rõ các bước giải cho mình đc ko ạ. mình đang cần gấp ạ!

Answer 8

1/2 nha 

Answer 9

= 1/2

Answer 10

\(2:\dfrac{5}{2}-\dfrac{3}{10}=\dfrac{2}{1}:\dfrac{5}{2}-\dfrac{3}{10}=\dfrac{4}{5}-\dfrac{3}{10}=\dfrac{8}{10}-\dfrac{3}{10}=\dfrac{5}{10}=\dfrac{1}{2}\)

Answer 11

1/2