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Step 4: Now move to the Hundreds column. Check if the number at the
top of the column is larger than or equal to the number at the bottom of
the column:
Yes. 1 is larger than or equal to 1. If Yes, subtract the numbers,
1 − 1 = 0. Write the answer below the column (between the
lines).

There are no more columns to the left. All columns have been
subtracted. The solution to 246 − 158 is 88.

Learning outcome: The students were able to perform subtraction of 3-
digit numbers with borrowing.