Question

[Cao Nguyễn Như Quỳnh]

GIÚP MINK VS CẢM ƠN NHÌU

TÍNH NHANH

1-1/2+2-2/3+3-3/4+4-1/4-3-1/3-2-1/2-1

Answer 1

[nguyễn minh anh]

\(1-\frac{1}{2}+2-\frac{2}{3}+3-\frac{3}{4}+4-\frac{1}{4}-3-\frac{1}{3}-2-\frac{1}{2}-1\)

\(=\left(1-1\right)+\left(2-2\right)+\left(3-3\right)+4-2.\frac{1}{2}-\left(\frac{2}{3}+\frac{1}{3}\right)-\left(\frac{3}{4}+\frac{1}{4}\right)\)

\(=4-1-1-1=1\)