Question
Add the following decimals: $18.6, 84.75, 8.345$ and $9.7$

Answer

Converting the given decimals, we get $18.600, 84.750, 8.345, 9.700$ Writing these decimals in column and adding,
we get: $\ 18.600\\\ 84.750\\\ \ \ 8.345 \\ \underline{+9.700} \\\underline{121.395\ }$
Hence, the sum of the given decimals is $121.395$

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