Question

Tính nhanh

C = -7/813 + 496 x (-7/813) + (-7/813) x 316

Answer 1

C=-7/813+496 x (-7/813)+(-7/813) x 316

  =-7/813 x (1+496+316)

=-7/813 x 813

=-7

Answer 2

\(C=\frac{-7}{813}+496.\frac{-7}{813}+\frac{-7}{813}.316\)

\(C=\frac{-7}{813}.1+496.\frac{-7}{813}+\frac{-7}{813}.316\)

\(C=\frac{-7}{813}.\left(1+496+316\right)\)

\(C=\frac{-7}{813}.813\)

\(C=\frac{-5691}{813}=-7\)

Answer 3

\(C=\frac{-7}{813}+496\cdot\frac{-7}{813}+\frac{-7}{813}\cdot316\)

\(C=\frac{-7}{813}\cdot1+496\cdot\frac{-7}{813}+\frac{-7}{813}\cdot316\)

\(C=\frac{-7}{813}\cdot\left[1+496+316\right]\)

\(C=\frac{-7}{813}\cdot813=-7\)