$\"\"$

The expression is $\"\"$

Place value chart for 1.3 and 2.6.

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 $\"\"$