The expression is 
Place value chart for 7.1 and 6.5.
\\\
\Line up the decimal points and draw a line below the numbers.
\
\\
First find the sum of the tenths digit.
\The sum of the tenths digit
.

\\
Next find the sum of the ones digit.
\The sum of the ones digit
.
The sum is 13, so carry the tens digit to the next column on the left.
\
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The sum is
.