2. Q: What is regrouping?
A: Regrouping or burrowing is a word
which we use to take ten from one
number to give to another. We do
this when we do not have enough to
subtract two numbers.
3. Q: How do you know when to regroup?
A: You know its time to regroup when
the number you are subtracting is
larger than the number which you are
subtracting from.
4. Here are some examples.
2 5
- 1 8
5 cannot take away 8.
So we must burrow
from the 2.
1 15
5. Here are some examples.
5 1
- 4 9
1 cannot take away 9.
So we must burrow
from the 5.
4 11
6. Let’s Play a Game!
Should you regroup?
Click Yes or No.
Continue
34. Let’s Recap! How do we know when to burrow?
When the number we are subtracting is larger than the number we are
subtracting from.
3 6
- 2 7
___
2 16
90
36. Let’s Recap! How do we know when to burrow?
When the number we are subtracting is larger than the number we are
subtracting from.
3 6
- 2 7
___
2 16
90
38. Let’s Recap! How do we know when to burrow?
When the number we are subtracting is larger than the number we are
subtracting from.
3 6
- 2 7
___
2 16
90
40. Let’s Recap! How do we know when to burrow?
When the number we are subtracting is larger than the number we are
subtracting from.
3 6
- 2 7
___
2 16
90
42. Let’s Recap! How do we know when to burrow?
When the number we are subtracting is larger than the number we are
subtracting from.
3 6
- 2 7
___
2 16
90
44. Let’s Recap! How do we know when to burrow?
When the number we are subtracting is larger than the number we are
subtracting from.
3 6
- 2 7
___
2 16
90