Đáp án:
Đề không rõ mik vt 2 TH nhé.
TH1:
`(-0,75 - 1/4) : (-5) + 1/15 - 1 ((-1)/15)`
`= (-3/4 - 1/4) : (-5) + 1/15 + 1/15 `
`= (-1) : (-5) + 2/15 `
`= 1/5 + 2/15`
`= 3/15 + 2/15`
`= 5/15`
`= 1/3`
TH2:
`(-0,75 - 1/4) : (-5) + 1/15 - 1 ((-1)/15)`
`= (-3/4 - 1/4) : (-5) + 1/15 + 5 `
`= (-1) : (-5) + 1/15 + 75/15`
`= 1/5 + 76/15`
`= 3/15 + 76/15`
`= 79/15`