$\"\"$ \\

The expression is $\"\"$

Place value chart for 5.8 and 4.2.

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 $\"\"$ .

The sum is 10, so carry digits to the next column on the left

$\"\"$ \\

$\"\"$ \\

Next find the sum of the ones digit.

The sum of the ones digit $\"\"$ .

The sum is 10, so carry the tens digit to the next column on the left

$\"\"$

$\"\"$ \\

The sum is $\"\"$ .