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Subtraction
with borrowing 
SUBTRACTION WITH BORROWING
Start with the right-hand column as usual.
63 -
27
When you try to take the 7 away from the 3,
you can't.
If you have 3 pence and a friend wants you
to lend her 7 pence, you can't.
TU
63 -
27
Look at the number 63.
It’s made up of 6 tens (60) plus 3
units (3).
63 -
27
You borrow one of the tens off the
60, and lend it to the 3 to make it
13.
This leaves you with 5 tens (50)
plus 13 - which still makes 63!
To show you have borrowed 10 off
the 60, cross off the 6 and make it
into a 5.
Put a 1 in front of the 3 to make it
into 13.
The sum now looks like this:
5
6 13 -
2 7
Take the 7 away from the 13.
5
6 13 -
2 7
6
Take the 2 off the 5.
5
6 13 -
2 7
3 6
Take the 2 off the 5.
5
6 13 -
2 7
3 6
The answer is 36!
Check your answer by adding it
back to the bottom number
27 +
36
1
2 7 +
3 6
6 3
1
You can carry the
one wherever you
want. Some people
do it at the top,
some at the bottom;
some others use
their fingers so that
they don’t get
confused. Just be
consistent!
2 7 +
3 6
6 3
Whatever way you
used, it should
come back to 63,
which is what we
started with! Now
try some more and
check them back
yourself by adding.

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e2e3subtraction.ppt

  • 2. SUBTRACTION WITH BORROWING Start with the right-hand column as usual. 63 - 27 When you try to take the 7 away from the 3, you can't. If you have 3 pence and a friend wants you to lend her 7 pence, you can't.
  • 3. TU 63 - 27 Look at the number 63. It’s made up of 6 tens (60) plus 3 units (3).
  • 4. 63 - 27 You borrow one of the tens off the 60, and lend it to the 3 to make it 13. This leaves you with 5 tens (50) plus 13 - which still makes 63!
  • 5. To show you have borrowed 10 off the 60, cross off the 6 and make it into a 5. Put a 1 in front of the 3 to make it into 13. The sum now looks like this: 5 6 13 - 2 7
  • 6. Take the 7 away from the 13. 5 6 13 - 2 7 6
  • 7. Take the 2 off the 5. 5 6 13 - 2 7 3 6
  • 8. Take the 2 off the 5. 5 6 13 - 2 7 3 6 The answer is 36!
  • 9. Check your answer by adding it back to the bottom number 27 + 36
  • 10. 1 2 7 + 3 6 6 3 1 You can carry the one wherever you want. Some people do it at the top, some at the bottom; some others use their fingers so that they don’t get confused. Just be consistent!
  • 11. 2 7 + 3 6 6 3 Whatever way you used, it should come back to 63, which is what we started with! Now try some more and check them back yourself by adding.