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The expression is 5.28 $\"\"$ 3.4.

Place value chart for 5.28 and 3.4.

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

Annex zero to align the numbers.

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First find the difference of the hundredths digit.

The difference of the hundredths digit = 8 $\"\"$ 0 = 8. \ \

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Next find the difference of the tenths digit.

The difference of the tenths digit = 12 $\"\"$ 4 = 8.

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Next find the difference of the ones digit.

The difference of the ones digit = 4 $\"\"$ 3 = 1.

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The difference is 1.85.