The expression is .
Place value chart for 121 and 56.
Line up the decimal points and draw a line below the numbers.
Annex one zero to align the numbers.
First find the difference on the ones digit.
Notice that it is not possible to subtract 1 from 6.
So, 1 unit must be borrowed from tens column.
The difference of the ones digit = 11 – 6 = 5.
Next find difference of the tens digit.
Notice that it is not possible to subtract 5 from 1.
So, 1 unit must be borrowed from hundreds column.
The difference of the ones digit = 11 – 5 = 6.
The difference is 65.
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