$\"\"$

The expression is $\"\"$

57 can be written as $\"\"$

Place value chart for 381 and 057.

$\"\"$

Line up the decimal points and draw a line below the numbers.

Annex one zero to align the numbers.

$\"\"$

$\"\"$

First find the sum of the ones digit.

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

$\"\"$ \ \

$\"\"$

Next find the sum of the tens digit.

The sum of the tens digit = $\"\"$ .

The sum is 13, so carry the tens digit to the next column on the left

$\"\"$ \ \

$\"\"$

Next find the sum of the hundreds digit.

The sum of the hundreds digit = $\"\"$ .

\ \ $\"\"$

$\"\"$

The sum is 438.