Question

Bài 1: Thực hiện phép tính: (tính nhanh nếu có thể)

0,75 + \(\left(\dfrac{-1}{3}\right)-\dfrac{5}{18}\)

Answer 1

\(=\dfrac{3}{4}+\left(\dfrac{-1}{3}\right)-\dfrac{5}{18}\)

\(=\dfrac{3}{4}+\left(\dfrac{-6}{18}\right)-\dfrac{5}{18}\)

\(=\dfrac{3}{4}+\left(\dfrac{-11}{18}\right)\)

\(=\dfrac{27}{36}+\left(\dfrac{-22}{36}\right)=-\dfrac{5}{36}\)

Answer 2

\(=\dfrac{3}{4}-\dfrac{1}{3}-\dfrac{5}{18}=\dfrac{16}{12}-\dfrac{4}{12}-\dfrac{5}{18}=1-\dfrac{5}{18}\)

\(=\dfrac{18}{18}-\dfrac{5}{18}=\dfrac{13}{18}\)