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| 1. |
\begin{array}{l}{\text { 1. Add the following rational numbers: }} \\ {\text { (i) } \frac{3}{7} \text { and } \frac{-6}{7}} \\ {\text { (iii) } \frac{-8}{13} \text { and } \frac{-4}{13} \text { and } \frac{-6}{11}}\end{array}. |
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