Bài 1: (2,0 điểm) Thực hiện phép tính: a) $\frac{2}{9}$ + $\frac{1}{3}$ : (-$\frac{3}{2}$) + $\frac{1}{2}$.$(-0,5)^{0}$ b) ($\frac{-1}{2}$)² - $\frac{5}{8}$ : (0,5)³ - $\frac{5}{3}$.(-6) c) $\sqrt{0,04}$ + $\sqrt{0,25}$ + 2,31 d) |$\sqrt{169}$ - $\sqrt{900}$| - |$\frac{-5}{4}$| : ($\frac{1}{3}$ - $\frac{1}{2}$)²

`K`

`a, 2/9 + 1/3 : (-3/2) + 1/2 . (-0,5)^0`

`=2/9 -2/9 + 1/2 . 1`

`=0 + 1/2`

`=1/2`

`b, (-1/2)^2 - 5/8 : (0,5)^3 - 5/3 . (-6)`

`=1/4 - 5/8 . 8 - (-10)`

`=1/4 - 5 +10`

`=21/4`

`c, \sqrt(0,04) + \sqrt(0,25) + 2,31`

`=0,2 + 0,5 +2,31`

`=0,7+2,31`

`=3,01`

`d, | \sqrt(169) - \sqrt(900)| - |-5/4| : (1/3-1/2)^2`

`=|13-30| - 5/4 : (-1/6)^2`

`=|-17| - 5/4 : 1/36`

`=17 - 45`

`=-28`