Question

2/5 + 3/10 - 1/2 giúp mình với

Answer 1

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

Answer 2

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

Answer 3

=4/10+3/10-5/10

=2/10

=1/5

Answer 4

`2/5 + 3/10 - 1/2`

`= 4/10 + 3/10 - 5/10`

`= 2/10`

`= 1/5`

Answer 5

4/10 + 3/10 - 5/10 = 2/10 = 1/5

Answer 6

=4/10+3/10-5/10

=2/10

=1/5

Answer 7

1/5

Answer 8

1/5

Answer 9

1/5