Example

Subtract the numbers.

349 - 175 = __

Answer

We set out a subtraction in columns

.

We subtract the ones first.  Here we do 9 - 5 = 4.

Next, we have to borrow from the hundreds column and do 14 - 7 = 7 in the tens column.

Finally, there is 2 - 1 = 1 in the hundreds column.

Are you happy with all that?

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