Câu hỏi của Hiền Phạm

Question

.tính nhanh$\frac{1}{2}+\frac{-1}{3}+\frac{1}{4}+\frac{1}{-5}+\frac{1}{6}+\frac{-1}{2}+\frac{1}{3}+\frac{1}{-4}+\frac{1}{5}$

Nguyễn Quang Tâm · Accepted Answer

$=\frac{1}{2}+-\frac{1}{3}+\frac{1}{4}+\frac{1}{-5}+\frac{1}{6}+-\frac{1}{2}+\frac{1}{3}+\frac{1}{-4}+\frac{1}{5}$$=\left(\frac{1}{2}+-\frac{1}{2}\right)+\left(-\frac{1}{3}+\frac{1}{3}\right)+\left(\frac{1}{4}+\frac{1}{-4}\right)+\left(\frac{1}{-5}+\frac{1}{5}\right)+\frac{1}{6}$$=0+0+0+0+\frac{1}{6}$$=\frac{1}{6}$Câu trả lời: $=\frac{1}{2}+-\frac{1}{3}+\frac{1}{4}+\frac{1}{-5}+\frac{1}{6}+-\frac{1}{2}+\frac{1}{3}+\frac{1}{-4}+\frac{1}{5}$$=\left(\frac{1}{2}+-\frac{1}{2}\right)+\left(-\frac{1}{3}+\frac{1}{3}\right)+\left(\frac{1}{4}+\frac{1}{-4}\right)+\left(\frac{1}{-5}+\frac{1}{5}\right)+\frac{1}{6}$$=0+0+0+0+\frac{1}{6}$$=\frac{1}{6}$

Nguyễn Ngọc An · Answer

$\frac{1}{2}+\frac{-1}{3}+\frac{1}{4}+\frac{1}{-5}+\frac{1}{6}+\frac{-1}{2}+\frac{1}{3}+\frac{1}{-4}+\frac{1}{5}$$=\frac{1}{2}+\frac{-1}{3}+\frac{1}{4}+\frac{-1}{5}+\frac{1}{6}+\frac{-1}{2}+\frac{1}{3}+\frac{-1}{4}+\frac{1}{5}$$=\left(\frac{1}{2}-\frac{1}{2}\right)+\left(\frac{1}{3}-\frac{1}{3}\right)+\left(\frac{1}{4}-\frac{1}{4}\right)+\left(\frac{1}{5}-\frac{1}{5}\right)+\frac{1}{6}$$=0+0+0+0+\frac{1}{6}$$=\frac{1}{6}$Câu trả lời: $\frac{1}{2}+\frac{-1}{3}+\frac{1}{4}+\frac{1}{-5}+\frac{1}{6}+\frac{-1}{2}+\frac{1}{3}+\frac{1}{-4}+\frac{1}{5}$$=\frac{1}{2}+\frac{-1}{3}+\frac{1}{4}+\frac{-1}{5}+\frac{1}{6}+\frac{-1}{2}+\frac{1}{3}+\frac{-1}{4}+\frac{1}{5}$$=\left(\frac{1}{2}-\frac{1}{2}\right)+\left(\frac{1}{3}-\frac{1}{3}\right)+\left(\frac{1}{4}-\frac{1}{4}\right)+\left(\frac{1}{5}-\frac{1}{5}\right)+\frac{1}{6}$$=0+0+0+0+\frac{1}{6}$$=\frac{1}{6}$

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