a) \( \frac{2}{5}+\frac{-1}{5}= \)
Answer
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Answer
\( \frac{1}{5} \)
Steps
Step 1 ：\( \frac{2}{5}+\frac{-1}{5}=\frac{2-1}{5} \)
Step 2 ：\( \frac{1}{5} \)
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