Question

  Giải hộ

Answer 1

a: =-1/7-6/7+3,25-0,25

=3-1=2

b: =4-3/5+2/3-2/5-1/3

=4-1+1/3

=3+1/3=10/3

Answer 2

`@` `\text {Ans}`

`\downarrow`

`2,`

`a)`

`1/(-7) + 3,25 + (-6)/7 - 1/4`

`= -1/7 + 13/4 + (-6)/7 - 1/4`

`= (-1/7 - 6/7) + (13/4 - 1/4)`

`= -7/7 + 12/4`

`= -1 + 3`

`= 2`

`b)`

`(4 + (-3)/5 + 2/3) - (2/5 + 1/3)`

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

`= 4 + (-3/5 - 2/5) + (2/3 - 1/3)`

`= 4 - 5/5 + 1/3`

`= 4 - 1 + 1/3`

`= 3 + 1/3`

`= 10/3`