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Regrouping
Mathematics, Grade 3
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Study Guide Regrouping Mathematics, Grade 3
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REGROUPING
What
Is
Regrouping?
•
Regrouping
in
addition
is
used
when
the
sum
of
the
ones
place
is
larger
than
nine.
The
tens
place
of
the
sum
is
moved
to
the
top
of
the
tens
place
column
to
be
added
with
the
others.
•
Regrouping,
or
borrowing,
is
used
when
the
ones
place
digit
in
the
top
number
is
smaller
than
the
ones
place
digit
in
the
bottom
number.
A
group
of
ten
is
taken
from
the
tens
place
and
added
to
the
ones
place.
How
Do
You
Regroup
in
Addition?
1.
When
you
add
the
ones
place
and
the
sum
of
the
two
numbers
is
larger
than
9,
you
need
to
regroup.
1
58
+39
7
2.
In
this
case,
8
+
9
=
17.
The
number
7
stays
in
the
ones
place,
while
the
one
moves
to
the
top
of
the
tens
place
to
be
added
with
the
others.
3.
You
then
proceed
to
step
two
once
again
and
add
all
the
numbers
in
the
tens
place.
1
58
+
39
97
© Copyright NewPath Learning. All Rights Reserved.
Permission
is
granted
for
the
purchaser
to
print
copies
for
non-commercial
educational
purposes
only.
Visit
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at
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How
Do
You
Regroup
in
Subtraction?
•
When
you
are
subtracting
a
two-digit
number
and
the
digit
in
the
ones
place
of
the
bottom
number
is
larger
than
the
digit
in
the
ones
place
of
the
top
number,
you
need
to
regroup.
6
14
74
-
39
5
•
In
this
case,
9
cannot
be
subtracted
from
4.
This
is
when
you
need
to
regroup,
or
borrow,
from
the
tens
place.
By
borrowing
a
set
of
ten,
the
number
7
is
changed
to
a
6
and
the
number
4
becomes
14.
Now,
9
can
be
subtracted
from
14.
•
You
then
proceed
to
step
two
once
again
and
subtract
the
numbers
in
the
tens
place.
6
14
74
-
39
35
Try
This!
Add
or
subtract
using
regrouping.
45
67
81
96
25
34
+18
+58
+99
-38
-17
-27
© Copyright NewPath Learning. All Rights Reserved.
Permission
is
granted
for
the
purchaser
to
print
copies
for
non-commercial
educational
purposes
only.
Visit
us
at
www.NewPathLearning.com.
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