Toán Lớp 7: 25. ($ frac{-1}{5}$ ) ³+ $ frac{1}{5}$ - 2 . ($ frac{-1}{2}$ ) - √ $ frac{1}{4}$

25 . (-1/5)^3 + 1/5 - 2. -1/2 - sqrt{1/4} = 25 . -1/125 + 1/5 - -1 - 1/2 = -1/5 + 1/5 + 1 - 1/2 = 0 + 1 - 1/2 = 1 - 1/2 = 1/2

Toán Lớp 7: 25. ($frac{-1}{5}$ ) ³+ $frac{1}{5}$ - 2 . ($frac{-1}{2}$ )

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