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Write the smaller number below the bigger number and follow the given steps:

Step 1: Subtract the ones. Step 2: Subtract the tens. Step 3: Subtract the hundreds.
8 – 1 = 7 ones 4 – 2 = 2 tens 3 – 2 = 1 hundred
Write 7 in the ones column. Write 2 in the tens column. Write 1 in the hundreds column.

H t O H t O H t O
3 4 8 3 4 8 3 4 8
– 2 2 1 – 2 2 1 – 2 2 1
7 2 7 1 2 7

Thus, 348 – 221 = 127
Subtraction with Regrouping

Before starting subtraction with regrouping, let us revise the regrouping.

regrouping tens to Ones
We know that if there are not enough ones in minuend to subtract from, we regroup the

numbers 1 ten to 10 ones. 2 tens 4 ones = 1 ten 14 ones

1 ten = 10 ones

t O t O t O t O

1 0 1 10 0 2 4 1 2 14 4
1 ten 10 ones 24 1 ten 14 ones

Example 1: Subtract 246 from 452.
Solution: Write the numbers in columns and follow the given steps:
Step 1: Subtract the ones.
Since, 6 ones cannot be subtracted H t O

from 2 ones, regroup tens and 4 12
ones, that is, borrow 1 ten = 10 4 5 2

ones to ones. – 2 4 6
So, 5 tens 2 ones = 4 tens 12 ones 6
Now, 12 ones – 6 ones = 6 ones

Step 2: Subtract the tens. Step 3: Subtract the hundreds.
4 tens – 4 tens = 0 tens 4 hundreds – 2 hundreds

H t O = 2 hundreds
4 12 H t O
4 5 2 4 12
– 2 4 6 4 5 2
0 6 – 2 4 6
Thus, 452 – 246 = 206 2 0 6

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