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Estimate. Then find the sum.
\(\begin{align}2.5\\+4.6\\\hline\end{align}\)
\(\begin{align}8.75\\+6.43\\\hline\end{align}\)
\(\begin{align}2.03\\+7.89\\\hline\end{align}\)
6.34 + 3.8 =
5.63 + 2.6 =
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