Question

Thực hiện phép tính

a) 27.5² - 25.127

b) \(\dfrac{-5}{12}\) + \(\dfrac{3}{4}\) + \(\dfrac{1}{-3}\)

Answer 1

\(a,27.5^2-25.127=27.25-25.127=25\left(27-127\right)=25.\left(-100\right)=-2500\\ b,\dfrac{-5}{12}+\dfrac{3}{4}+\dfrac{1}{-3}=\dfrac{-5}{12}+\dfrac{9}{12}-\dfrac{4}{12}=\dfrac{0}{12}=0\)

Answer 2

a = -2500

b = 0