$\"\"$

The expression is $\"\"$

Place value chart for 29 and 11.

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$\"\"$

line up the decimal points and draw a line above the numbers.

Annex zero to align the numbers. $\"\"$

$\"\"$

Next find the difference of the tenths digit.

The difference of the tenths digit = $\"\"$ .

$\"\"$

Next find the difference of the ones digit.

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

$\"\"$

The difference is -18.