Đáp án:
`1, 13/6`
`2, 12/7`
`3, 5/6`
Giải thích các bước giải:
`1,`
`| (-1)/4| - ( (-5)/6)^0 - 7/16 : (\sqrt{1/16} - 2/5)`
`= 1/4 - 1 - 7/16 : (1/4 - 2/5)`
`= 1/4 - 1 - 7/16 : (5/20 - 8/20)`
`= 1/4 - 1 - 7/16 : (-3)/20`
`= 1/4 - 1 - (-35)/12`
`= 3/12 - 12/12 + 35/12`
`= 13/6`
`2,`
`| (-5)/7| - 6 . ( (-17)/29)^0 + (-1)^{500} + \sqrt{36}`
`= 5/7 - 6 . 1 + 1 + 6`
`= 5/7- 6 + 1+6`
`= (5/7 + 1) + (-6+6)`
`= (5/7+7/7)+0`
`= 12/7`
`3,`
`[(-0,25) - 3/4] : (-5) + 3 . ( (-1)/3)^2 - | (-1)/5| + \sqrt{1/4}`
`= [ ( (-1)/4) - 3/4] : (-5) + 3 . 1/9 - 1/5 + 1/2`
`= -1 : (-5) + 1/3-1/5 + 1/2`
`= 1/5 + 1/3 - 1/5+1/2`
`= (1/5-1/5) + (1/3+1/2)`
`= 0 + (2/6 + 3/6)`
`= 5/6`
