Question

(6-2/3+1/2) - (5+5/3-3/2) - ( 3-7/3+5/2)

Tính nhanh nha ....tính bằng cách thường thì ko tick

Answer 1

\(\left(6-\frac{2}{3}+\frac{1}{2}\right)-\left(5+\frac{5}{3}-\frac{3}{2}\right)-\left(3-\frac{7}{3}+\frac{5}{2}\right)\)

\(=6-\frac{2}{3}+\frac{1}{2}-5-\frac{5}{3}+\frac{3}{2}-3+\frac{7}{3}-\frac{5}{2}\)

\(=\left(6-5-3\right)+\left(-\frac{2}{3}-\frac{5}{3}+\frac{7}{3}\right)+\left(\frac{1}{2}+\frac{3}{2}-\frac{5}{2}\right)\)

\(=-2+0-\frac{1}{2}\)

\(=-\frac{4}{2}-\frac{1}{2}\)

\(=-\frac{5}{2}\)