Subtract 4-digit numbers using column subtraction | Maths

Starter quiz

Complete the sentence. We can regroup 1 hundred as ___ tens.
- 1
- 10 ✓
- 100
Where is regrouping needed in this column subtraction?
- Regrouping is needed in the ones. ✓
- Regrouping is needed in the tens.
- Regrouping is needed in the ones and tens.
- Regrouping is not needed.
Where is regrouping needed in this column subtraction?
- Regrouping is needed in the ones.
- Regrouping is needed in the tens.
- Regrouping is needed in the ones and tens. ✓
- Regrouping is not needed.
Calculate the difference.
- '521' ✓
Calculate the difference.
- '372' ✓
Calculate the difference.
- '288' ✓

Complete the sentence. We can regroup 1 thousand as ____ hundreds.
- 1
- 10 ✓
- 100
Where is regrouping needed in this column subtraction?
- Only the ones
- The ones and the tens ✓
- The tens and the hundreds
- Only the hundreds
Calculate the difference.
- '1,635' ✓
Calculate the difference.
- '3,680' ✓
Sam had 4,991 tickets. She bought an airplane for 3,458 tickets. How many tickets does she have left?
- '1,533' ✓
Lucas had 2,392 tickets. He bought a car from the ticket shop and had 1,641 tickets left. How many tickets did the car cost?
- 2,351
- 867
- 751 ✓
- 1,568

Column subtraction can be used to subtract 4-digit numbers.
Work from the ones column on the right so that regrouping can be represented.
If the tens value of the subtrahend is greater than the tens value of the minuend, regroup 1 hundred as 10 tens.
If the hundreds value of the subtrahend is greater than the hundreds of the minuend, regroup 1 thousand as 10 hundreds.

Trying to subtract 3 from 2 for example without regrouping and seeing the difference as 1

Continually acknowledge the whole and the parts in each 'column' so that children know what we have and what is being subtracted.

Column subtraction - Column subtraction is a way of subtracting numbers by writing a number below another.
Regrouping - The process of unitising and exchanging between place values is known as regrouping.