Question

Thực hiện phép tính nhanh

a/\(\dfrac{3}{4}+\dfrac{1}{4}:\dfrac{-2}{3}-\left(-5\right)\)

b/\(12.\left(\dfrac{2}{3}-\dfrac{5}{6^{ }}\right)^2\)

c/\(3-6.\left(\dfrac{-6}{7}\right)^0+\left(\dfrac{1}{2}\right)^2:2\)

Answer 1

Answer 2

a: \(=\dfrac{3}{4}+\dfrac{1}{4}\cdot\dfrac{-3}{2}+5=\dfrac{23}{4}-\dfrac{3}{8}=\dfrac{43}{8}\)

b: \(=12\cdot\left(\dfrac{4}{6}-\dfrac{5}{6}\right)^2=12\cdot\left(\dfrac{1}{6}\right)^2=12\cdot\dfrac{1}{36}=\dfrac{1}{3}\)

c: =3-6+1/4:2

=-3+1/8

=-23/8