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Flip Charts
Adding & Subtracting Three-digit Numbers
Mathematics, Grade 3
❮
1
/
2
❯
Adding
Three-digit
Numbers
Subtracting
Three-digit
Numbers
Add
the
ones:
Regroup:
What
is
the
total
number
of
marbles?
How
many
more
marbles
does
Sue
have
than
Mike?
A
B
Ungroup:
B
7
ones
+
8
ones
=
15
ones
Subtract
the
ones:
A
1
ten
=
10
ones
Ungroup:
B
Subtract
the
tens:
A
1
hundred
=
10
tens
Subtract
the
hundreds:
A
16
ones
–
8
ones
=
12
tens
–
4
tens
=
Add
the
tens:
A
1
ten
+
4
tens
+
7
tens
=
12
tens
Add
the
hundreds:
A
1
hundred
+
1
hundred
+
2
hundreds
=
4
hundreds
15
ones
=
Regroup:
B
12
tens
=
Step
1
Step
2
Step
3
Step
1
Step
2
Step
3
1
4
1
7
2
+
5
ones
tens
hundr
eds
1
1
1
2
+
7
8
5
2
ones
tens
hundr
eds
1
4
7
+
7
8
5
ones
tens
hundr
eds
2
4
425
total
number
of
marbles
1
2
16
3
4
4
2
8
ones
tens
hundr
eds
x
xx
x
xx
xx
xx
3
16
4
2
6
8
8
ones
tens
hundr
eds
12
2
16
3
4
6
8
8
8
1
ones
tens
hundr
eds
12
278
Sue’s
marbles
147
Mike’s
marbles
7
8
4
7
1
2
6
8
2
3
4
8
xx
hundreds
–
hundreds
=
3
2
16
ones
–
8
ones
=
8
ones
12
tens
–
4
tens
=
8
tens
hundreds
–
hundreds
=
hundred
3
2
1
3
4
2
© Copyright NewPath Learning. All Rights Reserved. 93-4301
www.newpathlearning.com
Adding
&
Subtracting
Three-digit
Numbers
248
436
Mike’s
marbles
Sue’s
marbles
Adding
Three-digit
Numbers
Subtracting
Three-digit
Numbers
Add
the
ones:
Regroup:
What
is
the
total
number
of
marbles?
How
many
more
marbles
does
Sue
have
than
Mike?
A
B
Ungroup:
B
7
ones
+
8
ones
=
15
ones
Subtract
the
ones:
A
1
ten
=
10
ones
Ungroup:
B
Subtract
the
tens:
A
1
hundred
=
10
tens
Subtract
the
hundreds:
A
16
ones
–
8
ones
=
8
ones
12
tens
–
4
tens
=
8
tens
Add
the
tens:
A
1
ten
+
4
tens
+
7
tens
=
12
tens
Add
the
hundreds:
A
1
hundred
+
1
hundred
+
2
hundreds
=
4
hundreds
15
ones
=
1
ten
and
5
ones
Regroup:
B
12
tens
=
1
hundred
and
2
tens
Step
1
Step
2
Step
3
Step
1
Step
2
Step
3
4
1
7
2
+
ones
tens
hundr
eds
1
2
+
7
8
5
2
ones
tens
hundr
eds
4
7
+
7
8
ones
tens
hundr
eds
425
total
number
of
marbles
2
16
3
4
4
2
8
ones
tens
hundr
eds
x
xx
x
xx
xx
xx
3
16
4
2
6
8
8
ones
tens
hundr
eds
2
16
3
4
6
8
ones
tens
hundr
eds
278
Sue’s
marbles
147
Mike’s
marbles
7
8
4
7
1
2
6
8
2
3
4
8
xx
hundreds
–
hundreds
=
hundred
3
2
1
3
4
2
Key
Vocabulary
Terms
•
add
•
ones
•
total
•
digit
•
regroup
•
ungroup
•
hundreds
•
subtract
•
more
•
tens
© Copyright NewPath Learning. All Rights Reserved. 93-4301
www.newpathlearning.com
Adding
&
Subtracting
Three-digit
Numbers
248
Mike’s
marbles
436
Sue’s
marbles
\|xiBAHBDy01633lz[
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