Đáp án:
`(2^2 : 4/3 - 1/2) . 6/5 - (-7/15)^0`
`= (4 : 4/3 - 1/2) . 6/5 - 1`
`= (4 . 3/4 - 1/2). 6/5 - 1`
`= (3 - 1/2). 6/5 - 1`
`= 5/2 . 6/5 - 1`
`= 3 - 1`
`= 2`
`(1 + 2/3 - 1/4) . (0,8 - 3/4)^2`
`= (12/12 + 8/12 - 3/12) . (4/5 - 3/4)^2`
`= 17/12 . (16/20 - 15/20)^2`
`= 17/12 . (1/20)^2`
`= 17/12 . 1/400`
`= 17/4800`
`(1/3)^50 . (-9)^25 - 2/3 : 4`
`= (1/3)^50 . (-3^2)^25 - 2/3 . 1/4`
`= (1/3)^50 . (-3^50) - 1/6`
`= -(1/3 . 3)^50 -1/6`
`= -1^50 - 1/6`
`= -1 - 1/6`
`= -7/6`
