Bài 1: (2,0 điểm) Thực hiện phép tính: a) $\frac{5}{2}$ + $\frac{1}{2}$ : ($\frac{-3}{4}$).$\frac{4}{9}$ - 4² - (-2)³ b) ($\frac{3}{2}$)² - [0,5 : 2 - $\sqrt{81}$.($\frac{-1}{2}$)²] c) (-$\sqrt{0,04}$).$\sqrt{0,01}$ + 12,02 d) |$\sqrt{169}$ - $\sqrt{900}$| - |$\frac{-5}{4}$| : ($\frac{1}{3}$ - $\frac{1}{2}$)²

`K`

`a, 5/2 + 1/2 : (-3/4) . 4/9 -4^2 - (-2)^3`

`=5/2 + 1/2 . (-4/3) . 4/9 - 16 - (-8)`

`=5/2 -8/27 -16+8`

`=119/54-8`

`=-313/54`

`b, (3/2)^2 - [0,5 : 2 - \sqrt(81) . (-1/2)^2]`

`=9/4 - [1/2 . 1/2 - 9 . 1/4]`

`=9/4 - [1/4 - 9/4]`

`=9/4 +2`

`=17/4`

`c, (-\sqrt(0,04)) . \sqrt(0,01) + 12,02`

`=-0,2 . 0,1 + 12,02`

`=-0,02 +12,02`

`=12`

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

`=|13 - 30| -5/4 : 1/36`

`=17 - 5/4 . 36`

`=17 - 45`

`=-28`